‘What if I find that barmaid and get her on record with a photofit ID?’

‘Well, good luck with that, because she’s probably already packed in the back of some lorry and bound for Calais!’

‘Sir! We’ve got Andrea on CCTV. She did board a train to Forest Hill the night she vanished, and her body was found close to the high street. Christ, is it any more obvious that I could be right?’

Marsh looked exasperated. ‘Okay. Just tread easy; be subtle in your investigation. The press is watching us.’

‘I will, sir.’

‘And I want to be kept informed. Everything, you understand?’

‘Yes, sir.’

Marsh gave her a look and she left his office.

14

The morgue seemed to leach what little warmth Erika had left in her body as they walked down the long, fluorescent-lit corridor. They reached a metal door, where Moss buzzed through on an intercom. Forensic pathologist Isaac Strong buzzed them in.

‘Good morning,’ said Isaac softly, projecting an aura of calm and order. The white lab coat covering his tall frame was neatly pressed and spotless, a dark leather mobile phone case poking from its top pocket. He wore black skinny jeans and Crocs, and his dark hair was swept away from his high forehead. Again, Erika was drawn to his soft brown eyes below his thinly arched eyebrows. His autopsy room was a heady mix of steel and Victorian porcelain tile. Along one wall was a row of stainless steel doors, and in the centre of the room, three autopsy tables also of stainless steel, surrounded by gutters. Andrea Douglas-Brown lay under a white sheet, on the table closest to where they had entered. Andrea’s eyes were now closed. Her hair had been washed and neatly brushed back from her forehead. The bruising had darkened, but her face was still swollen. Erika had hoped, for her family’s sake, that Andrea would look as if she were sleeping, but despite the efforts to clean her up, her body still looked battered.

Isaac moved around the trolley and gently removed the sheet. In addition to the bruising and lacerations over her naked body, there was now the coarse, neat stitching from where the Y-shaped incision had been made, running from each shoulder, converging at the chest and moving down between her full breasts to the sternum.

‘There was no fluid in the lungs, so she was dead when she went into the water,’ said Isaac. ‘The ice preserved decay, but you’ll note the blanching of the skin from prolonged exposure to water. Ligature marks on the neck and a fractured collarbone indicate death by strangulation. As I hypothesised, the bruising around the neck indicates a medium-sized hand, no unusual features such as missing fingers.’

He paused.

‘Toxicology results show there was a high level of alcohol in her blood, plus a small amount of cocaine. She hadn’t eaten for several hours; her stomach was empty apart from the broken front tooth, which she probably swallowed, unintentionally, during the attack.’

He picked up a small plastic phial containing the broken tooth and held it up to the light.

‘I found a residue of an adhesive chemical, found in most brands of masking tape, on her mouth and teeth.’

‘So she was gagged?’ asked Erika.

‘It would indicate so. There was no sign that she’d been raped. It does appear, however, that she had anal sex close to the time she died, and it appears to have been consensual. Again, I swabbed the anus for semen and blood, but there was none. But there was latex residue, and small amounts of lubricant.’

‘She used a condom?’ asked Erika.

‘Whoever had anal sex with her used a condom,’ corrected Isaac.

‘But how can you be sure that the anal intercourse was consensual?’

There was an uncomfortable pause.

Isaac explained: ‘There is a marked difference between consensual penetrative sex and non-consensual. With consensual sex, the body is usually relaxed. Non-consensual sex is often coupled with extreme stress, panic and resistance, causing muscles to tense and clench, which in turn can lead to internal bruising and abrasion of the flesh. There was no damage whatsoever to the lining of her rectum. Of course, another theory is that intercourse could have occurred post-mortem.’

‘Please God, no,’ said Erika. ‘I hope not.’

‘It’s possible, yes, but I doubt it. This appears to be a crazed and frenzied attack. The killer set upon her like an animal. Her hair has been pulled out at each temple – would he have had the will and control to stop to put on a condom?’

‘Were any condoms found at the scene?’ asked Erika.

‘The area around the boathouse and boating lake was littered with condoms. We’re working on analyzing them all, but it’s taking time.’