'The chances that maybe the victims scratched the perpetrator is pretty high,' Joseph Giacalone, a retired New York police sergeant, told Newsweek.
"They're trying to defend the attack off, and they'll do anything they can, gouge their eyes or their face and that is a real possibility. But if you didn't bag the hands when you took the bodies out or at the time, you can have a chance of losing that kind of evidence."
Forensics expert Joseph Scott Morgan said DNA from blood on the bodies may provide clues that could aid police in their investigation. "Any DNA that is on the surface of that weapon from the first attack, then is introduced into the attack on the second one, and so forth, and so on. So you get this co-mingling of DNA evidence," Morgan, a distinguished scholar of applied forensics at Jacksonville State University in Alabama, toldWhile that provides a huge challenge to those analyzing the DNA, Morgan said it could also help determine the order in which the victims were attacked.
"If you can determine who has the least amount of co-mingled DNA evidence on that person, that might give you an indication as to who was attacked first," he said."It would perhaps give you an idea of who was targeted."targeted but have not specified why they think that or which student may have been targeted.
The Moscow Police Department has regularly released information about the timeline of the night the students were killed and
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