Interesting read - "The Case of the Vasectomized Rapist"
One of the many advantages of working at a private laboratory is the ability to assist other crime labs which lack the technology or expertise with which to bring a case to a close. Here,...
www.guardian-forensics.org
Amateur opinion and speculation
Questions I am pondering, and would like opinions please to help me think this through...
IIRC, the Perp in Julia's case was allegedly careful in not leaving fingerprint evidence to the point of wearing gloves; found at the scene. Some have suggested those gloves were "planted", but I refute that speculation since we know the gloves were left "twisted" implying they had been worn and twisted during removal.
I've never heard if skin cells or tiny hairs were obtained from the gloves; I'm assuming not. My speculation is that (a) while the Perp might have been at Julia's apartment for a length of time, he was eventually interrupted, and made a hasty exit, dropping the gloves or (b) He left the gloves intentionally as a taunt of sorts, not understanding the DNA value they potentially possessed
The gloves being left behind was mistake #1 (and I do believe it was a mistake)
Mistake #2 were the male fluids found on Julia's body; he didn't wear a condom. Who is dumb enough to wear gloves to protect their fingerprints, but then stupid enough to leave a genetic calling card like this? We have already learned something important about the Perp based on these samples (He has a vasectomy). Further sophisticated testing such as from Parabon Labs or Othram could tell us more.
Mistake #3 was when the Perp was likely still in Julia's apartment when one of her roomates came home for clothes. If this theory is correct, it would provide another window of time to firmly determine the whereabouts of potential suspects and further rule them in...or out.
Mistake #4, visibility. Someone saw this Perp; it just hasn't dawned on them....yet. The Perp didn't look out of place, was in plain sight. This was someone who looked normal walking around Peninsular Place. There was allegedly no forced entry. Julia either recognized them and let them in, or they looked "official" enough to let in. (e.g. someone in a uniform of some sort). Given this was late in the evening, I think it is more likely the former, vs. the latter.
Mistake #5, knowledge. This reduces the potential Perp pool significantly. The Perp had to know the schedule of Julia's roomates, that they would not be home. Let's think about that for a moment. Three co-eds living together with boyfriends and friends coming and going constantly. The window of opportunity to find Julia home alone was small, very small. THE PERP KNEW JULIA'S ROOMATES WOULD NOT BE HOME. The Perp was well prepared with his kill kit and gloves. His timing was prepared as well, with military precision.
Mistake #6, even more knowledge. Not only did the Perp know that Julia's roomates would be gone, but he had to know that occupants of the immediate units surrounding Julia's would be out as well, to avoid the detection of a struggle. If we consider who had knowledge of Julia's roomies being out, as well as the occupants of the immediately adjacent units, that further reduces the suspect pool.
Questions
1. Was there anyone at the apartments who kept a roster of when residents would be absent from their units? (Might be used to conduct repairs, etc. when vacated)
2. Were all uniformed personnel (at minimum), questioned, or poly'ed? This would include security guards, repair persons, landscapers, etc.
3. Were all employees who would have knowledge of resident schedules polygraphed?
4. Were any fresh tire tracks observed and recorded? (Was it snowing?) If so, any correlations to sedan, truck, etc?
5. Any fresh shoe prints observed and recorded outside, leading up to Julia's apartment, or inside the apartment? Any scuff marks inside the apartment that suggested workman's boots, etc.
My list could go on and on, and I hope the new detective will take a vigorous approach to reinvestigating Julia's case with fresh eyes. If we isolate my points that the suspect pool is greatly limited by knowledge of roommate and surrounding resident schedules...I think that's a great place to start.
Amateur opinion and speculation