He then moved on to the next slide which was taken in the daughter’s bedroom. On top of the bed there was a woman lying face down. As Jane scanned the body she noticed that the woman’s legs were apart, her dress had been lifted up over her bare buttocks, and her underwear had been ripped in half. Harker didn’t need to say anything as it was clear from the photograph that she had been raped and murdered. There was a stunned silence and Jane could see some of her fellow officers looked horrified. She didn’t feel squeamish, more fascinated by the scene and eager to hear from Harker about the items and clues recovered for forensic examination.
Harker continued, ‘The pathologist estimated that both women had been dead since early to late Wednesday evening. The mother in the chair suffered a repeated beating to her head and face with a blunt object, but that didn’t actually kill her. She was physically sick, but the packing tape round her mouth forced her to try and swallow her vomit back down and she choked to death. Her attacker stabbed her in the heart after death and further multiple injuries were also discovered at the post-mortem. She had many minor stab injuries to her neck, chest, arms and legs, none of which would have killed her, but would have caused intense pain.’
He took a long pause before he continued.
‘The daughter’s hands were taped together at the front and her mouth gagged as well. She was strangled from behind, most probably while the assailant raped her, though this may have occurred after the strangulation. There were no traces of semen so the suspect either failed to ejaculate or wore a condom.’
There were more gasps around the room at the suggestion of necrophilia.
Harker moved on to the next slide which was a close-up of the daughter’s face and neck revealing her bulging, bloodshot eyes.
‘The red pinpoint-type marks in her eyes are petechial haemorrhages and this is a classic sign to the pathologist of asphyxiation due to obstruction of the airway. The haemorrhages occur when blood leaks from the tiny capillaries in the eyes, which can rupture due to increased pressure on the veins in the head when the airways are obstructed. The red abrasions on her neck were caused by the assailant’s fingers and you can also see some fingernail marks. However, these can sometimes be caused by the victim themselves when trying to pull the attacker’s hands from their throat.’
Jane held up her hand. ‘I was wondering about finger-prints.’
Harker looked at his watch. ‘I was going to cover that after lunch, but seeing as you ask I’ll do it now. A finger-print at a crime scene
Jane raised her hand again, and he glanced towards her.
‘Could some people’s prints be at a scene innocently? I mean what if they’d just visited the premises for-’
‘Yes, yes, I am just coming to that.’
He went on to explain to the class that every fingerprint recovered from the scene was sent to the fingerprint bureau at Scotland Yard and manually searched against the many thousands of criminals’ fingerprints on record. Prints were also taken from everyone known to have visited the premises for elimination purposes.
‘We discussed fibres from a suspect’s clothing.’ Harker stared at Jane. ‘If his clothes are covered in blood he would probably burn or throw them away, so what use are fibres then?’
Jane thought he was testing her knowledge, but he didn’t know what she had learned so far on the Julie Ann Collins case.
‘Well, if the suspect went to and from the scene in a car there may still be traces of the car fibres at the murder scene and traces of the victim’s and suspect’s clothes in the car. There may even be traces of the victim’s blood in the car.’
‘That is a good point, because I did find a large amount of blue cotton fibres on the daughter’s top, skirt and legs, which could not be traced back to anything in the cottage and therefore must have come from the suspect’s clothing when he lay on top of her and committed the rape and murder.
