'A date rape drug,' someone muttered at the front.
'Yes,' confirmed McCloughlin. Looking back at the report, he continued to read, 'Colourless, odourless, can be easily made in home-based labs using solvents and caustic soda. Sold in either liquid or powder form, it's a powerful anaesthetic that can render someone unconscious in under twenty minutes. Initial effects are feelings of euphoria — hence the popularity amongst clubbers. But larger doses can lead to unconsciousness, convulsions and coma. When mixed with alcohol results can be fatal. Long-term use has been poorly researched, but studies show it leads to massive mood swings, paranoia and irritability. Can also lead to psychotic episodes, especially if the user has a prior history of mental illness.'
McCloughlin looked up. 'In other words the usual druggy shit: it all ends in tears. So from what I was told on the phone just now, what we appear to have is a very similar substance to GHB but with certain structures altered to produce — and I use the technician's words — massively enhanced biological activity. GHB is hard enough to detect in the bloodstream anyway, but the guy said this stuff showed up as just a shadow of a trace on the gas chromatograph. As you know, drugs affect different people in different ways, but he thinks in each case the amount ingested is minute — we're talking a tiny pinch.
'On the basis of that information and the post-mortems, what appears to be happening is this: our victims are being knocked out first — probably in minutes by this stuff — and then this white gunk is being injected down their throats. The gunk, as it turns out, is simple silicon gel. Several people have commented that its smell was familiar — that's because it's the stuff you use around windows, sinks and the like to make them watertight. Tubes of it can be bought in any DIY store nationwide.' He waited for the buzz of comments to die down. 'Now, I'd like to introduce Dr Neville Heath. He's a criminal psychologist and hopefully can shed some light on why the killer is choosing this particular modus operandi.' McCloughlin turned to the man and gestured towards the waiting room. 'It's all yours.'
With a nervous cough the man stepped forwards. 'Unlike the forensics laboratory technician, I'll try and keep my analysis simple.' Several officers laughed and, looking more confident, the doctor continued. 'Three victims, all relatively young females. None showing evidence of sexual assault, yet all subdued with a powerful derivative of a known date rape drug. Killed in a very particular manner and then laid out on the floor with their arms out at their sides. It all suggests considerable planning, the acting out of a long-held fantasy, perhaps. It's a confusing scenario and one that, I believe, results from one of two possible motivations.'
He paused and glanced around the room before continuing. 'Let's start with the sexual one. The first victim had been posing for glamour photographs and advertising her services in adult contact magazines. It is my opinion that this will turn out to be what links all three victims. The second victim had fetish clothing in her wardrobe. On the face of it, the third victim seems very unlikely to share this… hobby. Churchgoer, very religious, straight-laced. But don't let that fool you. Often these types have very surprising sides to them, just very well hidden. Take, for instance, this fact. To which part of Britain does the Post Office deliver the most mail order sex toys? The God-fearing, outer-lying Scottish islands. This may well be the result of there being no sex shops closer than Aberdeen. But it also reveals a side to the island's population you don't read about in any tourist literature.
'Now our perpetrator — and let's assume it's a man for probability's sake — obtains sexual gratification in a very unusual way. It not only excludes any willing, or even conscious, participation from the female — it also seems not to include any physical contact on his part. He's a watcher, an observer. And he probably doesn't like to be seen by anyone other than himself when seeking his own sexual gratification — hence he subdues his victims first.'
'Like that American guy, the heir to some cosmetics fortune. Wasn't he sent down for raping women he had drugged?' asked a female officer.
'You pre-empt me,' answered the doctor with a quick smile. 'Although that person did seek physical contact: he's currently serving out a one hundred and twenty year sentence having filmed himself having sex with his victims and even saying to camera, “That's exactly what I like in my room — a passed-out beautiful girl.” In contrast, our perpetrator doesn't actually touch his victims. But I do believe he's making films or photographs of them for later use.'
He paused again and took a sip from a glass of water on the table beside him. 'Therefore we're looking for someone with an interest in cameras or camcorders. When it comes to a property search, the first thing you should look for is some sort of darkroom facility if he's shooting on film, or a computer with the appropriate software if he's shooting on digital. I'd guess the images he's already taken have been made into some sort of display — perhaps on the walls or in albums. Somewhere readily accessible for when he needs to look at them. Another factor to bear in mind is how he's getting to his victim's houses. He's carrying photographic equipment. So at the least he has a briefcase or bag. Is he driving to the houses? Is he getting the train? All three victims lived within walking distance of train stations. Next thing to consider is why he's adopted this pattern of behaviour. My guess is that he's impotent.'
'So we start staking out all the clinics round town?' someone asked teasingly.
'Or people ordering Viagra?' asked another.
McCloughlin cut in, 'Our job is working out how to find this man. Dr Heath's here to give us pointers as to what to look for. Carry on, Doctor.'
The doctor continued a little more slowly. 'I'll produce a profile soon. But with most serial killers, a white middle-class male aged between twenty-five and fifty-five years are the usual parameters. I think he's likely to still have a close relationship with a significant female relative — probably his mother, but could be an aunt or grandmother. He may well live with her, and the relationship is likely to have become strained ever since he reached sexual maturity. This man craves his privacy after all.'
Jon noticed several officers discreetly roll their eyes at one another. He heard someone whisper, 'Well that narrows things down a bit.'
'Normally I'd be happy to just develop this profile,' the doctor continued. 'But there's one aspect to the killings that doesn't seem to fit with it. Why is he killing his victims by closing up their airways with silicon gel? Perhaps our man is trying to still his victims' tongues, or more accurately their voice boxes. It's a symbolic way of ensuring their silence. Again, this could be for a number of reasons — perhaps they have discovered something about him, or have already revealed to other people something about him. It appears all the victims felt comfortable enough with the attacker to let him into their house, so it's reasonable to expect some degree of familiarity. I know this hypothesis appears more tenuous. 'The authority was now ebbing slightly from his voice. 'I need more time to look at the information we have on the victims so far. But please bear it in mind during your investigations.'
Jon didn't know if it was the rush from the cigarette that made him do it, but he cleared his throat and stood up. 'I might have something that fits with your second theory.'
The doctor looked at Jon, who looked at McCloughlin, who gave him the nod. 'I've just noticed all the victims so far lived in the immediate vicinity of owners of high-performance cars. Victim one, Polly Mather, shared her driveway with her neighbour who owns a Subaru Impreza. Victim two, Heather Rayne, lived on a road with no off-road parking. Her neighbour had left his Jag directly in front of her house. Third victim, Mary Walters, shared the back yard of her building with a couple that own a Lexus. I hope I'm not letting the car gang case I've been working on cloud my judgement here, but take this scenario. The thief is casing out expensive cars and making the mistaken assumption that our victims are the owners — basically because the cars are parked directly outside the victims' properties. He's opening up their letterboxes and snagging what he thinks are the car keys. Problem is, they're not. So when he can't get the car open, he's using the keys to let himself into the house: and we end up with a dead body.'