About the Author

Emma Kavanagh was born and raised in South Wales. After graduating with a PhD in psychology from Cardiff University, she spent many years working as a police and military psychologist, training firearms officers, command staff and military personnel throughout the UK and Europe. She lives in South Wales with her husband and young sons.

Also by Emma Kavanagh

Falling

Hidden

The Missing Hours

title page for The Killer on the Wall

This ebook is copyright material and must not be copied, reproduced, transferred, distributed, leased, licensed or publicly performed or used in any way except as specifically permitted in writing by the publishers, as allowed under the terms and conditions under which it was purchased or as strictly permitted by applicable copyright law. Any unauthorized distribution or use of this text may be a direct infringement of the author’s and publisher’s rights and those responsible may be liable in law accordingly.

Epub ISBN: 9781473535602

Version 1.0

Published by Arrow Books 2017

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Copyright © Emma Kavanagh 2017
Cover photography: Silas Manhood
Design: Natascha Nel

Emma Kavanagh has asserted her right to be identified as the author of this Work in accordance with the Copyright, Designs and Patents Act 1988

First published in Great Britain by Arrow Books in 2017

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A CIP catalogue record for this book is available from the British Library

ISBN 9781784752668

For Daniel and Joseph, who make all things worthwhile.

Whoever fights monsters should see to it that in the process he does not become a monster. And when you look long into an abyss, the abyss also looks into you.

– Nietzsche

Do not be dismayed to learn there is a bit of the devil in you. There is a bit of the devil in us all.

– Arthur Byron Cover

22 July 1996

It began with the bodies.

They had been seated, backs propped against the tumbledown stones of Hadrian’s Wall, faces a bitter white. Their heads were tilted forwards, their jaws grazing their sternums. You might have thought that they were sleeping. But there was the colour of them, the rigid emptiness of them, the first shadowy scent of decomposition riding on the promising heat of the day to come.

Isla Bell felt the ground sway beneath her, the village and the moors retreating far far away, so that it was just her and the dead. Her knees gave way. She sank down, her bare legs swallowed by wet grass. Her palms landed on an outcrop of rock, spikes of pain zinging through her hands, her stomach contracting and she folded over, a dry heave, a merciless heat running through her.

They had been murdered. Isla was only fifteen, knew little of death, and yet even she had no doubt. Three people did not wander from their homes in the early morning and line up alongside one another in order to die. Not unless they had no choice.

A necklace of bruises ringed Kitty Lane’s neck. Her hands had been folded into her lap, a knotted network of veins stark against the grey of them. She wore a fuchsia housecoat, bootie slippers lined with fur, her legs bare against the damp grass. Her head had begun to slip sideways, had drifted downwards so that her tightly permed curls rested gently against the cheek of the corpse beside her.

Ben Flowers. Hadn’t he got married recently? Rhian, Rachel, something like that? There was a line of blood, dried along the side of his forehead. His arms too had been folded into his lap, but the left hung at an odd angle, as if he had been given an additional elbow, midway along the radius. His jaw too, that looked wrong, out of position somehow. And, if you looked very closely, you could see the dark red bruise of fingermarks on his neck.

And then there was Zach. Zach sat three seats across from her in English. Zach ate tuna sandwiches for lunch and hated spiders. Zach once broke his leg trying to prove to his brothers that he was big enough to jump from a second-storey window. Zach was quiet and kind and funny and, undeniably, dead.

She allowed her head to sink downwards, looking at the blades of grass, the ant that hurried up her bare knee, and told herself to breathe. It had been a run. That was all. A day like any other, in which her eyes flickered open as the clocks rolled on to 6 a.m., the sunlight breaking through the chink in the curtains and her body thrilling with the fizz of contained energy. Her mother said that she was like a springer spaniel, needed a couple of good runs a day to be bearable. She had let herself out of the house, the clock reading 6.09. Through the garden and out on to the moor, vast in its rolling bleakness. Had paused for a moment, the cool air lapping at her skin. A kestrel cruised above the scrubby moorland, dipping low over the curve of the Whin Sill, following the arch of it as it clambered up into the amber dawn sky. Then she had pushed off, the sole of her foot shoving away the uneven ground below. She ran for the wall, the cold sharp in her chest, the barrenness pushing her to run faster, harder. A pull to the left, her trainers followed the arc up the Whin Sill, her calves straining against the incline, breath coming hard and fast as she reached the height of it, balancing on the narrow ledge that abutted the stones of Hadrian’s Wall. And then, turning left, her feet working to remain where they were on the slender pathway, running into the sunrise, so that its fingertips of red reached out to her, tugging her onwards. The stones of the wall stretching out beside her like a column of marching ants.

She ran with a long, loping gait, fighting to keep her balance on the sloping land that seemed determined to tip her over. Perhaps that was why she ran it. Perhaps it was the bloody-mindedness of being where the land itself did not seem to want you. Or perhaps it was the wall. Because Hadrian’s Wall was home to her. When she was a child and was asked where she lived, she would simply reply, I live on the wall. The wall was what protected her from the moor, from the wildness beyond. It was that line of organisation that cut across the moorland, suggesting that even this could be tamed by some stones and an abundance of will.

Then as her lungs were straining and her heart was hammering and the outskirts of the village had come into sight, she had descended from the peak, a headlong dash down a wild slope, turning away from the cresting sun and the early morning mist that sat low across the horizon. Into Briganton itself, an oasis of civilisation in a desert of green. The stone-built houses huddled together, immensely proud of their age and their neatness, the gardens put together with an excess of care, flower beds lush and organised with a precision even the Romans would have been proud of. It had been still as she had run through the empty streets, a town frozen as it waited for the day to begin. She had run through the village, along the narrow pavements that graced roads just as narrow. Up past the primary school, past the tree that she had once got stuck in, up to the church, its heavy wood doors shut tight. Then at Bowman’s Hill, the furthest reach of the village, once she had the Cheviot hills in sight, looping left, back down and around until she reached the wall again. Running, her footsteps loud in her head, thinking of little things, like exams and school and boys and the kind of things that you think of when you are fifteen and alone, and then, as the landscape shifted, and the moor flattened out beneath her, seeing something off in the distance that her mind simply could not explain.

Getting closer and closer and thinking that at any moment the scene would rearrange itself and then what was before her would make sense again. Because she was in Briganton and in Briganton there were no dangers and the world was small and orderly and safe. And so what she thought were dead bodies, well, that simply could not be.

Isla stared at the sharp-edged stone beneath her fingers. She didn’t want to look any more. She didn’t want to see.

But then it was unlikely that Kitty or Ben or Zach wanted to be here either, so she forced her gaze upwards, allowed it to rest on them. She needed to call for someone, needed to get help. Her father would be at home still, would not have left for his shift.

Isla pushed herself upright. Dad. He would know what to do, would be able to fix this, make it whole. But even as the thought formed she could feel the lie of it. Nothing would make this whole. In an instant the world about her had changed. Nothing would ever turn it back to how it used to be.

That was when she heard the sound, a low moaning like the wind that sometimes funnelled its way down through the Cheviots, and a feeling of electrification raced across her skin along with the knowledge that she was not alone.

Isla whipped around, expecting to see … what? A killer waiting behind her? But there was nothing, just the moor and the sleepy village. And then again that sound. She wanted to run, could feel her entire body sparking with it, the need to escape. But she stayed, turning around, her gaze running along the clambering, dipping Whin Sill, past the stones of the ancient wall, the bodies before it, tracking past them even as they tried to stay her attention.

Then a flash of something, an unexpected shadow falling in just the wrong place. The slightest suggestion of movement.

He lay perhaps a hundred metres away, face down in the grass. It looked as if he too had been positioned, but had slumped, the weight of his body tugging him down to the welcoming earth. Isla’s breath became short again, a new horror plucking her from what was already horrific enough. She moved slowly, cautiously towards the fourth dead.

The sound came again, and with the sound the slightest twitch of movement.

Isla ran then, throwing herself carelessly down into the grass besides the fourth victim. His eyes were closed, the hair on the back of his head densely matted with blood.

‘Oh God,’ she said. ‘It’s okay, Ramsey. It’s going to be okay.’

Friday, 21 October 2016

THE BOGEYMAN

ISLA

Monsters rarely look the way you expect. Isla watched Heath McGowan through the window. He lay prostrate, his head held in place with a cylindrical cage. He should have looked like the devil. And yet there he lay, all 5’9 of him, a thick frame supporting a square head, hair cut bluntly short, somehow smaller now than the last time she saw him. An ordinary man, a small pot of a belly beginning to form, nails bitten down to the quick. And yet it would be no lie to say that she had thought of him every night for twenty years, that every night as her hand grazed the lamp switch, she had paused to drink in the last of the light and had thought of the killer on the wall. She was a thirty-five-year-old woman and she was afraid of the dark. Heath McGowan was the reason.

‘You okay in there, Heath?’ She leaned closer to the microphone, depressing the speaker key, keeping her voice light, friendly even. ‘We’re going to get started in just a minute.’

She watched him on the monitor, his eyes darting upwards as they dissected her words. What was he looking for in there?

But Isla had done this kind of thing many times before and she knew full well what Heath McGowan was hoping to find in her.

Weakness.

‘You take your time, Professor.’ His voice was calm, almost relaxed, as if somehow he had made the coffin of the MRI scanner, the guards and the shackles that waited for him disappear, and he was lying on a beach.

Isla released the button and glanced across at the prison guard. Steve? Stan? Attractive in an over-muscled way, he stood flush with the window that separated the control room from the scanner – separated him from his prisoner – his gaze locked on the machine and what could be seen of Heath McGowan’s body. It was a strange sensation. To know that the room had been swept, that anything that could, even in the wildest of imaginings, be transformed into a weapon had been removed, that there was a guard here, one outside the door, another outside the door beyond that, and yet still to feel that your safety relied on the good grace of a monster.

‘There’s coffee there.’ Isla waved to the table beside her. ‘And cake. You should make yourself at home. This will take a while.’

The guard nodded, risking the briefest of glances in her direction. ‘I’m good. Thanks.’

‘MRI is ready.’ The radiographer was a small woman, neat and grey, unimpressed with the calibre of the patient. She drummed her fingernails on the desktop.

Isla depressed the button. ‘Okay, Heath. We’re starting the structural scan now. This will take a few minutes.’

‘Yup.’

It was a special kind of madness this, lunacy in the pursuit of science. To remove a man convicted of two or three or four or more murders from his prison cell, to place him into a transport, with guards who look at you like you have lost your mind. To bring him to a hospital, take him into a room in which you will have to remove his handcuffs, encourage him to lie down on a sliding table and be slotted into the clanging wildness of an MRI. All the while hoping against hope that whatever evil put him in prison can remain boxed away, at least for this little while.

And yet here they were.

‘Lucky number 13.’ Connor leaned against the back wall, cradling a chipped mug.

‘Lucky number 13,’ Isla agreed.

Thirteen serial killers. Thirteen times they had removed monsters from their cages, had peered into their brains, had felt their hot breath, their ice cold smiles, and, thirteen times, Isla had known that her survival depended on the good grace of the devil.

Isla watched Heath’s feet, white trainers slack against the bed, and wondered what he was thinking. Of course, the real question was, did any of the previous twelve count? Really, if she was being honest with herself, hadn’t it always been about this moment and this man?

She had run across the moor, on that July day twenty years ago, her heart beating hard, unsure whether she was running from or running to. Had flung herself through the back gate, past the goldfish pond, screaming for her father like she was the one being murdered. She didn’t know how she made him understand, how she had put into words that which seemed so far beyond them, and yet somehow she did, and then she was running again, this time her father alongside her, pulling ahead of her, seeming to lead instead of follow. She had thought that Ramsey would be dead, that he couldn’t possibly have survived the hours, years that it had taken her to call for help. And yet, miraculously, he was not, remained clinging to life in the sodden grass. She had thrown herself down beside him, had clung to his hands, muttering comfort that she did not believe while her father stood and stared at the dead. Then a drowning cascade of sound, wailing sirens, blue lights thrown up against the stone walls of the nearby cottages, and people, everywhere, it seemed.

More childhoods than hers had ended that day. Because it seemed now that all of Briganton had been experiencing a prolonged infancy, that it had been cradled by Hadrian’s Wall and the Cheviots and the ocean of moorland, that the world had been kept at bay for longer than should have been possible. And then, on that July day, all that had been kept back came crashing in, and the faces that had before been creased up only with petty concerns now wore the telltale signs of terror. It seemed clear that whoever had done this was one of them. No one could quite put their finger on why this must be so. Perhaps it was because that was the worst they could imagine, and the entire village had suddenly realised that they were not immune to the worst after all. There was no talking on street corners, no evenings in the local pub. The summer fete held three days after the deaths was attended by, at most, a dozen hardy individuals. Briganton had experienced real fear for the first time. Its response was to lock itself away. Isla’s father had vanished, Detective Sergeant Eric Bell now needed far more elsewhere than he was in their little home. He became a ghost to them, a poltergeist leaving traces of breadcrumbs on kitchen counters, creaking floorboards in the wee small hours as he returned for a few hours’ sleep before beginning again.

Then three weeks later came the next one. The murder of nineteen-year-old Amelia West, a trainee nurse living two streets over from Isla’s own home. And disbelief warped into blind panic. He, whoever he was, was not done. He was hunting.

Isla’s parents had begun to talk about moving, about leaving the village that was in their blood, their bones. Her father, on the rare occasions she saw him, had grown older, more weighted down, whether by the deaths or by his inability to solve them.

Two weeks after that had come the murder of Leila Doyle. Twenty-five years old. She had vanished while putting her washing out.

Isla had stopped sleeping then, had moved into her sister Emilia’s room, where she would lie, staring into the lamp that remained steadfastly on as the night rolled around into morning. Had waited each day, each night, for him to come for her.

And then, after six weeks of torment, there had come a day on which her father was gone, for a day, a night, another day. She had started to wonder if he too was dead, if her mother was simply afraid to tell them. Then, the phone ringing late in the evening, her mother’s hand shaking as she picked it up, silence and then her face changing, transforming back to something that Isla had not seen in six long weeks. He got him. Your father got him. His name is Heath McGowan.

Heath McGowan had been arrested in a pub in Newcastle. He had gone there straight from the flat of his then girlfriend, Lucy Tuckwell. Eighteen years old and six months pregnant with their first child. When police – or, more specifically, her father – had arrived at the flat, they had found Lucy dead on the floor, the final victim of the series.

‘Maybe we’ll get a nice fat tumour pressing on the amygdala,’ Connor suggested. He sipped his coffee, watching the screen. ‘Love me a nice fat tumour.’

Isla glanced back at him. Lanky and lean, hair cut short, but not short enough to prevent the ends of it flicking up into those inexorable curls. It was different for him, she reminded herself. Some days, she felt she had known Connor her entire life, like he was a brother to her. But then she remembered that he was not here back in the dark days, that he had not survived what they survived, and so would forever remain separate, only able to know them as one looking in through a window. They had worked together for six years, knew each other’s rhythms and tastes. And yet, for Connor, what they did remained an adventure, a walk through a jungle on an organised tour, the simulation of danger where the real threats have been filtered out, packaged away. Perhaps, thought Isla, that was why he always seemed so much younger than her, even though they were the same age. Perhaps it was the excitement in him, the thrill of academic exploration. For him, the horrors that they heard were little more than a scary story shared around a campfire. For her, they were her life and her home.

She shrugged. ‘You never know. Although, frankly, he’s always been a prick.’

The sounds began, thunderous bangs as the hydrogen atoms are shifted, realigned, shifted again. A rising harmony of beeps, one picture, two, three, four, a thousand. Isla leaned back in her chair, her eyes trained on the hands of the killer on the wall. They lay limp at his side. Large, the fingers shorter than you would think, stubby. The hands that wrapped themselves tight across the throats of Kitty Lane and Ben Flowers and Zach.

Isla had waited for this since she was fifteen years old.

They had said that she wouldn’t get him, that Heath McGowan had built himself into a legend, that in twenty years he had not once spoken about the dead bodies he left seated against Hadrian’s Wall. Many had tried. For ten years following McGowan’s arrest, Stephen Doyle, the husband of Leila had written to him once a week, pleading for a meeting, begging to know what had become of his wife in those last precious hours of her life, just how her end had come. I just want to sit across from him, Stephen had said. I just want to look into the eyes of the man who took Leila, so I can try and understand. But Stephen, like the journalists, the police officers and the academics that followed him, had been met with a hefty wall of silence. McGowan, it seemed, would take his stories with him to the grave.

Isla, however, never afraid to tilt at a windmill, had written to him, pouring into the letter all of the charm and the persuasion that she could muster. Had reminded him of their childhood connection, tenuous at best. And had promised to provide him with answers, to delve into the glorious mystery that was the McGowan brain and to lay the results before him.

To the amazement of all but Isla, he had written back.

It had been a week ago that Isla Bell had first made the hour-long drive to Winterwell prison, a fortress that stood alone on the edge of Kielder forest, had watched as Heath McGowan was led into the room, seated at the table before her, and had known that she had done what none had done before. She had got in.

‘You look different.’ Heath McGowan had studied her with that spotlight focus that would have told her, had she not already known, that she was in the company of a psychopath.

‘I’m older,’ Isla had replied, coolly.

‘Yeah.’ Heath had laughed, head dipping down, coquettish almost. ‘Aren’t we all? But you … age suits you. What are you? Thirty-four?’

‘Thirty-five.’ Isla had sat at the desk, had watched Heath opposite her. Had felt her heart thundering. Had told herself that this was simply number thirteen. That she had done this many times before. That this was no different. Of course, all of that was a lie, wasn’t it? Because this time, with this man, it wasn’t about the stories, about victims who were simply names in a crime story. This time it was about the person who had left three dead for her to find. Who had tried to murder Ramsey and had failed. It was a feeling of the wind blowing as you stand on a cliff edge.

‘Of course. Four years younger than me. I remember you from school, you know.’

In her memory, Heath was a ghost in a ripped denim jacket, his lip curled into an ever present snarl. One of them and yet not one of them. His mother a drinker, his father in the wind, he had landed on his grandmother’s doorstep, would stay a while, long enough to get himself a reputation as trouble, then would leave again each time his mother resolved to do better, to be stronger than her need for the alcohol. Yet, weeks, or months, later he would always return, each time angrier.

‘I’m surprised you were there often enough to remember me,’ Isla said, wryly. They were old acquaintances chatting about days past. They were neighbours, sharing a history. They were a serial killer and the teenage girl who found his first victims.

Heath gave another laugh. ‘Aye, well … had better things to be doing with my time. Your sister. Emily? Emilia? Now, she was always a looker. How is she?’

He was testing her, a great white nibbling around the edges of a cage to see if it really will protect the diver within. Isla looked at him, her gaze steady. Emilia had moved away from the village as soon as she was able to. She’d married her first boyfriend, had three little boys, a detached house on a modern estate in Newcastle and a rampant anxiety disorder – the last thanks to the man before her. Isla smiled. ‘Emilia is fine. So, Heath, shall I tell you a little bit about our study? See if it’s something you’re interested in participating in?’

‘Aye.’ He had watched her, gaze hungry.

‘I’m a professor of criminal psychology at the University of Northumberland. I specialise in brain function and its influences on criminal behaviour.’ She slid into the speech like a comfortable pair of shoes. ‘I’ve worked with a number of other people in the past on this. What I’d like to do with you is have a bit of a chat, talk about some of your experiences, childhood, things like that, get you to take part in a few tests, and then, in a couple of weeks, we’ll arrange for you to go through a functional MRI, magnetic resonance imaging, which will allow us to see how your brain is working, how it responds to stimulation, things like that.’

Heath had leaned forward, his forehead knitted in a frown of concentration. ‘So … like, this functional … whatsit … does it, like, tell you why I do the stuff I do? I mean, will you be able to see if there’s something wrong with my brain? If that’s why?’

‘It will certainly give us some indication, yes.’

Heath had sat up straighter then, and Isla had known. She had him.

A low buzz and Isla’s head snapped around as she was pulled back to the present, the monster in the tube.

‘Professor Bell?’ The radiographer tapped some keys. ‘Structural scan is complete.’

‘Okay,’ said Isla. ‘Let’s start with the moral decision making task.’ She leaned forward, speaking into the microphone. ‘Heath? We’ve completed the structural scan. Now we’re entering into the functional phase of the MRI. Keep looking at the screen in front of you. I’m going to present you with a series of choices. Use the button box I gave you to select one. You happy?’

‘As a clam, Prof.’ His gaze on the monitor was flat, unmoving.

The guard snorted, rolling his eyes at Isla.

She pushed the microphone away, smiled. ‘Could be worse. The last guy we had in here decided to mark his territory by pissing on the floor.’

‘Charming.’

Connor pulled out a chair beside her, lowering himself into it, one hand carefully grasping a cupcake. ‘Yeah, he was a beaut. Cupcake?’

Isla shook her head. ‘How the hell do you eat so much but stay so skinny?’

He grinned. ‘Good genes.’ He lowered his voice. ‘How’s Ramsey doing?’ Nodded towards the scanner. ‘He, ah, he got any issues with this?’

Why has McGowan agreed to do this? Ramsey had asked. Her husband had put the pan on the stove, harder than was strictly necessary, lit a blue flame beneath it, poured in a glug of oil.

Isla had kept her gaze averted, her full concentration directed to checking the tomatoes for inadequacies. Ramsey, he’s been in prison for twenty years. He’s probably bored. The chance to have a nice day trip, even if it’s just to an MRI scanner, probably seems like a pretty sweet deal. She had pushed closed the door to the fridge, expression effortfully light. Because it seemed somehow crucial that she kept it hidden, how much this mattered to her, how great her own need was to sit across from the killer on the wall.

Ramsey had nodded, the back of his blond head dipping up and down, just once. Had swept the onions into the pan. Were his hands shaking?

I just … I don’t trust that guy.

The rest was left unsaid. Because he tried to murder me. Because he murdered my brother, five others besides. Isla turned, watching her husband’s wide shoulders, the arch of his arms, quiet muscles beneath a plaid shirt. He still had nightmares that kept her awake into the small hours of the morning, twisting and pulling at the sheets, his hands grasping at the pillow, at her, as in his dreams he attempted to save himself. To save his brother. And she would cradle him to her, mother to a small child.

It had become a rhythm in their marriage, calm waters shaken by something and by nothing, the swell of a wave, a crest, and then, from nowhere, calmness again. There would be long periods in which Ramsey slept peacefully, and then a change – restless nights leading into sallow mornings, quietness becoming a dense silence. His features gaining a sad slackness, a jumpiness, as if her husband had moved into a perpetual state of waiting, ready to leap at the closing of a door or the unexpected fall of a foot. The counsellor had said that it would be like this, that there would be periods of peace laid alongside periods of unrest. Post-traumatic stress disorder coupled with relapsing/remitting depression. A diagnosis that Isla could have made herself. This period, these last five years, this had been the most peace they had known. Isla had begun to wonder if the storm had finally passed. If life could in fact be different. Then those words – I’m going into the prison, I’m going to meet with Heath McGowan.

If he’s agreed to be a part of the study, Ramsey said, stirring the onions, the oil spitting, sizzling, maybe it’s because he knows who you are. You know what these guys are like, with their grandstanding. Wouldn’t it just be the perfect twist of the knife to get to you? Your father’s daughter. My wife?

Isla had dug the point of the knife into the tomato, its ripe to the point of bursting skin rupturing beneath the pressure, sliced with a fast sweep. Had tried very hard not to feel that flush of anger. That she was by definition to be explained only by her relationship to someone else. To the men in her life. That she had got to Heath, had squeezed her way inside, and that the success of that was only because of her father – the man who arrested him – and her husband – the man he had attempted to kill.

She let her knife race through the tomatoes, her heart beating fast. The trouble was, she wasn’t at all sure he wasn’t right.

Isla had taken a deep breath, her tread careful. This was, after all, her husband’s story more than it was hers. She could bow out. Get Connor to do it. He was more than capable. And yet … Isla thought of that moment, every single night, her hand on the light switch, the fear that raced from her abdomen up to her mouth at the thought of the darkness about to come. She was not good with fear. Ramsey had caught her once, had come home late on a night when darkness had plummeted early, brought about by wild weather, had found her walking the blackened house, bare feet, wearing nothing but a strappy vest and absurdly short shorts. Had looked at her like she was insane. And she had never said it, had never explained to him that she had been pushing herself to the point of her greatest terror. With the darkness and the vulnerability of near nakedness, it was like a private dare. I bet you can’t … Isla had always been a sucker for dares.

Well, I’m sure it will be fine. All of the authorisation is in place, so I don’t really have much choice in the matter now, Isla lied. Just … look, these guys, they want something to fill their days in there. A study like this, it gets them interested. And they get to brag. You know, tell someone how clever they were, how they almost got away with it. I’m sure McGowan has no clue who I am.

Now Isla sipped her coffee, black, the bitterness of it making her wince. ‘Ramsey’s fine. He gets that this is important. You finished up all the childhood stuff, right?’

They were two halves of a coin, she and Connor. Him: developmental and environmental influences. Her: cognition, genetic factors. Taken together, they could tell a story – how a serial killer became a serial killer. Because if you could tell that story, then maybe, just maybe, you could change it.

‘Yeah, it’s … not great. I mean, it’s not as bad as some I’ve heard. Pavel Devreaux still gets to keep his worst-childhood-imaginable crown.’

Pavel Devreaux killed eleven men, mostly homeless, helpless, in and around Calais in the late 90s. He then ate their internal organs.

‘Heath’s mother was an alcoholic, father erratic, but around just long enough to sexually abuse Heath from the ages of four to seven. Pretty vile stuff. The mother alternated between affection and fury, and it looks like little Heath had no way of predicting which way she would go. The most consistent presence seems to have been the grandmother. From what he says she tried her best, but sounds like she was pretty overwhelmed by the whole thing. Heavily critical, not much in the way of affection. Would routinely tell him that he had been taken over by Satan.’

‘Well, she was right about that much,’ muttered the prison guard, keeping his stare on the unmoving feet of Heath McGowan.

Isla nodded, watching the screen where Heath’s selections were flashing by. The test was coming to its conclusion. The attentional focusing one would begin shortly. She pulled a file closer, flipped the cover open. ‘I finished going through the PCL-R.’

The Psychopathy Checklist – a measure of badness.

‘And?’

She looks at him, her gaze flat. ‘Thirty-seven.’

Thirty points would have indicated that he was a psychopath. Forty was the most extreme level of psychopath it was possible to measure.

Connor nodded. ‘Well, that’s pretty definitive.’

‘Yes. Yes, it is.’

Of course, thought Isla, sometimes you just knew. Even without a test. There was a certain feeling that would occasionally come from sitting with a psychopath, that notion that your senses have been supplanted, that what you think now, what you feel, will come from him, this man in front of you, rather than from all that you know to be true. It was like being bewitched and horrified at the same time, the watching of yourself from a great distance as you are led willingly into danger. Isla often thought of psychopaths as the anglerfish of the human race.

‘I liked Briganton,’ Heath had said on that day, a week ago. He had leaned forward across the desk, his expression earnest, hands hooked together like a child at prayer. ‘I mean, my nan, she was all right. Lived there all her life. ’Course, you say that name now and all anyone ever thinks of is … you know.’

You. The killer on the wall. There were coach tours now, organised excursions for the dark of mind, the opportunity for misery tourists to visit the famous murder sites in the north. Briganton was stop number three. Isla had stopped telling people where she was from, had grown weary of that look of almost-recollection, of the dawning realisation and, far too often, of excitement.

Then Heath had looked at her with the air of one who has recalled something. ‘How is your dad? I heard he became a superintendent. Superintendent Eric Bell. Has a nice ring to it. I always liked him. Gave me a hard time, when I was pissing around as a kid, but he was all right. ’Course, I went off him a bit when he arrested me.’ Something glimmered in his eyes. Amusement? ‘I heard that he became quite the celebrity. The great Eric Bell, the detective who brought down the killer on the wall. You know, he never even said thank you. I mean, that big old career of his, I did make it, after all.’ He had studied her, critically. ‘You look just like him, you know?’

Isla wondered faintly what it was that Heath was expecting? Did he expect her to cry? To rush from the room, a little girl pulled to pieces by the big bad wolf before her. Perhaps he had not yet understood just what he had done to her at the age of fifteen, how much he had changed her and just how many wolves she had tamed since then.

‘Yes. Yes, I do.’

Fuck you.

Now the MRI thumped, beeped. Isla watched Heath’s hands work the button box, the speed of them suggesting enjoyment.

‘Professor? The structural scan has finished processing. It’s ready to be viewed now if you want to see it?’ The radiographer didn’t look at Isla, her gaze locked on her screen in an expression of rapt boredom.

Isla pushed her chair back, and stood up. ‘Please.’

She felt Connor behind her as the screen moved from black to grey and then an image filled the screen. She studied it and, despite herself, her heart sank.

‘No gross abnormalities.’

Isla gazed at the brain of the killer on the wall, its swirls and ridges. There was no convenient tumour impacting on the amygdala that would explain the aggression, nothing that she could point to and say ‘here, here is where the evil lies’. To all intents and purposes, they were looking at a perfectly normal brain. But then, wasn’t that the thing with serial killers? Weren’t they all, when you looked at them, perfectly normal? Right up until the monster in them was unleashed.

TO STAY OR TO GO

RAMSEY

The rain poured down, a relentless barrage that made an almost-night from what should have been an early afternoon sky. It turned the flat roof slick, and the wind that blew down from the Cheviots yanked at Ramsey, threatening to pull him over the side of it, send him tumbling down twenty storeys on to the concrete below. He wiped his hands across his eyes, gritted his teeth, tried to sound calm. ‘It’s okay.’

‘It’s not okay.’ Stephen Doyle wasn’t looking at him. Instead his entire attention was directed downwards, beyond the lip of the roof where he stood, to the empty air and the solid ground beneath. ‘It’s not okay. It hasn’t been okay since Leila … Do you know how hard it has been? Every day to get out of bed. Every day praying that something will happen, that I’ll be hit by a bus, that I’ll contract some horrible disease, anything, just so that it’s over, so that I can see her again.’

‘Stephen …’

‘Twenty years, Rams. Twenty years of what? This isn’t life. It’s torture.’ He leaned further out, so far that it seemed inevitable that gravity or the howling wind would do what will had so far failed to do, would tug him outwards, into the abyss.

Ramsey took one step forward, one back. Any closer and he might drive him over, any further and he wouldn’t be close enough. His suit trousers clung to his legs, rain plastering the hair to his head.

Ramsey had been in Carlisle covering a city council meeting, a dull morning topping off a dull article on truancy levels, their impact on crime statistics. One of those mornings that makes you question your life choices, that makes you think, surely there must be more than this. And there was more, of course; there was Isla. And so he had left the city, had driven the short distance north, past the airport, the modest planes overhead ricocheting in the wind, and then on to the university campus. He would buy his wife lunch, perhaps persuade her to finish early for once, to allow herself to breathe.

And yet it had not worked out that way. He had slid his car into the car park, his gaze scanning left, right, for Isla’s BMW. It was quiet here today, empty spaces filled with little but puddled water. Perhaps there were exams on, he thought. Perhaps it was the weather. He manoeuvred the car into a space beneath the shadow of the tower block and twisted around in his seat. But no, there sat Isla’s parking space, resolutely empty.

Ramsey sat for a moment, considered his options. He should go home. He had work to do, articles that were due in, and yet still he sat there, watching the rain batter against the windscreen. Then his gaze was caught by a loping figure emerging from the arts building. The man walked slowly in spite of the rain and, although he wore a coat, it hung unzipped, the sides flapping in the wind. Ramsey squinted through the rain, the man’s movement triggering a memory. Stephen Doyle. He had pushed open the car door, wincing as the rain sparked against his face. ‘Stephen!’

But if the figure heard he gave no sign of it, just continued on with his long stride, disappearing into the psychology building. Ramsey sank back into his seat, considering. It must have been him. Although it had been a couple of months since he had seen him last, the memory of Stephen Doyle, his face seemingly tattooed with a grief that simply would not heal, was seared into his brain. He had heard he had gone back to uni. That he had begun a degree, although in what Ramsey would not have been able to say.

Ramsey had been reaching for the ignition key when a car skidded into the car park, sliding into the space beside Isla’s. He had grinned, pulled his hood up and dived out into the rain.

‘Connor!’

Connor had spun round, arms filled with bags and box files. ‘Rams.’ He blinked the rain from his eyes. ‘You looking for Isla? She’s still out at the hospital. With McGowan, you know?’

It had sent a prickle through him, the thought of that.

‘She’ll be a while yet.’ A heavy frown, his hair flopping into his eyes. ‘What the hell did you manage to do to your arm?’

‘I slipped, jogging.’ Ramsey had rolled his eyes, tucking his sling-held arm beneath his loosely draped coat. ‘Pain in the arse. Especially driving.’

But Ramsey’s attention had drifted from Connor to a movement high up on the roof. He peered into the rain, straining to make sense of it. The dark sky, the never-ending rods of rain, the horizontal line of the roof that bisected his vision. And hovering on the edge of it a long, loping figure.

‘Oh God.’

Connor had followed his gaze, head tilted backwards, his mouth growing slack with the realisation of what they were witnessing. ‘Jesus … is that …’

‘It’s Stephen Doyle. He’s going to jump.’ Ramsey was running, footsteps light on the slick ground.

A few minutes later Ramsey stood on the rooftop. Stephen was leaning outwards into the abyss, his coat flapping wildly, his face becoming slack, as resignation set in.

‘I know, Stephen. I know,’ Ramsey said, blinking away the rain. ‘But you’ve lasted. You’ve made it this far. Don’t throw it away now.’

He sensed Connor behind him, moving around him, held out a hand. Keep back. A quick glance to his side, enough to ensure that they both understood: this is close.

‘Throw it away?’ Stephen gave a harsh laugh that was tugged away by the wind. ‘Throw what away? That’s what I’m trying to tell you. I have nothing. There is nothing to throw away. You know I lost my job? They said I was taking too many sick days … unreliable, that was the word. You know I’m doing this damn degree?’ He gave a harsh laugh. ‘My tutor just told me I’m failing. Failing. Something that any eighteen-year-old can do, I’m failing. I’ve even moved back in with my sister. Like a damn bum. Everything I had vanished with Leila on that day.’

That day. It had been one of light and warmth and sunshine, when Leila Doyle had been hanging the washing out. A balmy summer’s afternoon. When Stephen had gone looking for her, he had found her slippers, a basket of still wet washing tipped across the lawn. But of Leila there was nothing. It had taken three days. For three days her absence had hovered over Briganton like a storm cloud. Then, on the fourth day, a police patrol had found her rapidly decaying body seated against the wall.

‘I don’t sleep. I haven’t slept in years. Every time I close my eyes, I see her body, those …’ his hands came up, fingers curving into a shape, ‘those fingers around her throat.’ Stephen shifted so that his right foot balanced, half on, half off the roof.

Ramsey felt a prickling across the back of his neck. ‘I know.’

Every night closing his eyes, every night promising himself that this night would be different. The darkness descending and then there they were again, the bodies, multiplied now into thousands, hundreds of thousands, each staring at him with empty eyes. Moving through them, searching, fear grappling with his insides, knowing what he would find, because it was the same every single night. Then seeing it, in amongst the mountain of death – Zachary, arms reaching out, lips moving, leaning in so he can hear the last breath of voice. ‘Rams––’

He stood on the roof, in the pouring rain, felt Connor moving alongside him, watching him, waiting for him to lead. The thing was, life for those living in the shadow of the killer on the wall was an uneven sort of dance, an unsteady jiggling motion designed to sidestep the past, while simultaneously keeping it in centre focus. It’s important people don’t forget. How often had he said that? And yet, when you couldn’t forget you couldn’t forget. And so you became suspended in a kind of hinterland, that was neither the past nor the present but some heady, uncomfortable mixture of the two.

‘We were trying for a family. Did I tell you that? Leila, she always wanted a big family, four, maybe five kids. She didn’t want anything else. Just to be a mother, to be married to me. It was … it was such a good feeling, to know that I was enough for her, that the idea of our family, that was all she dreamed of.’ Stephen wasn’t looking at him, was leaning forward, looking down at the drop. ‘She would have been such a good mother. I think about that sometimes, about what it would have been like if we’d started already, if we’d had a kid. Thing is, I know it’s selfish, but I just think it would have been better, you know, that I would have had a part of her still with me. That I would have had to have been normal.’

What could be more natural? Ramsey had thought that, too. Isla, I think we should start trying. For a baby, I mean. I think I’m ready. Aren’t you? Ramsey had held it out to his wife, a gift or a burden, he wasn’t sure, had offered it up like it was the most normal of normal things. And yet that wasn’t why, was it? He wasn’t just a man who had reached the age at which one starts having children. He was a man who was stuck, who had become enmeshed in the past and, no matter how much he wriggled and squirmed, he had still not succeeded in releasing himself. But a baby … that was what normal people did. That was the shape of a normal life. It was a terrible thing, to want a child in order to save yourself, but if Ramsey dug deep, that was the truth of it. He wanted his child to set him free.

‘I know what you mean,’ he told Stephen, but the wind had stepped up its efforts, the howling turning into a dull roar as if an army marched across the moor. Ramsey’s heart began to race as he saw Stephen swaying with the pressure of it, could feel Connor stepping closer, a low noise in his throat, almost a growl. ‘I want more than anything to be normal too.’

Isla hadn’t answered. She had opened her mouth, as if she would, and then, with the sense of a last-minute reprieve, the phone had rung and she had hurried to answer it. They hadn’t spoken of it since.

Connor touched Ramsey’s elbow, making him jump. Eyes a question, shall we grab for him?

The world had shifted, its focusing narrowing on to this single point in time. Stephen Doyle, the position of his feet on the roof’s edge, the slackness of his features as if the life had already drained out of him, the angle of his body away from the building and out towards the tumbling ground below.

Stephen shook his head slowly, his gaze now on the ground below. ‘It’s better this way,’ he mumbled.

Ramsey felt Connor squeeze his arm, could see it as if it had already happened. That one short step – here safety, there oblivion.

Stephen was inhaling, a noticeable filling of the chest. Preparing.

‘You know how I survive?’ The words tumbled from Ramsey’s mouth.

Time suspended. Stephen glancing back at him, frowned. It was a slight movement, small enough that you would miss it if your every sense wasn’t trained upon it, but his body shifted, a small lean back towards the building.

‘I refuse to let the monster win. I … I have dreams too. Nightmares. I see the bodies. Feel the fingers. But … I fight it. Because, if I give in, if I give up, then he’s won.’ He was aware that his voice was getting smaller. ‘I won’t let him win.’ Ramsey glanced at Connor, a quick nod. ‘Stephen, I know it feels that this is your only option, but … you have survived. For twenty years, you have survived. I know it hasn’t been easy. I know that you’ve … been tempted.’ An overdose had followed closely after Heath’s trial and conviction. Another one on the ten year anniversary of Leila’s murder. “I know there have been many times when you’ve wanted to end it. But you’ve survived. That in itself is an achievement.’

Something was happening, a thought spreading across Stephen’s face. Doubt, perhaps?

‘This choice …’ Connor said quietly. ‘It can never be undone. And yet you have managed all these years without having to make it. Please, at least let us try getting you some more help. Let’s see if we can make this bearable, at the very least. I have friends, they’re the best people in the world to help trauma survivors. We can go downstairs now, make some calls, get you some help straight away.’

Stephen stood, looking out into the grey night, and then leaned forward, peering down towards the ground. Then he was falling, tumbling, tumbling, body hitting the pavement with a crack. But no, he wasn’t. He was turning back, away from the abyss, had reached a hand out now to grip the wall, clinging to it like a mother clings to a child, like he hadn’t intended to throw himself to his death mere moments before. Ramsey felt Connor dart round him, unstuck at last, take a tight hold of Stephen’s wrist, one hand on his shoulder, guiding him back to the rooftop.

Ramsey simply stood, his head light.

‘Come on. Let’s get you inside.’ Connor’s voice was now overlaid by fake joviality. ‘Rams? Shall we? Stephen, we’ll give your sister a shout and then shove the kettle on. Nice cuppa, that’s what we need.’

‘Yes,’ said Ramsey, weakly. ‘That … yes.’