CNN Forensic Files August 23, 2015 06:10:00
Biological evidence left by the perpetrator. the only possible piece of evidence was the bloodstain on dawn's bed. the blood was dawn's. but was it possible that the blood held other clues? >> the evidence techs looked at it and reviewed it, and the officer asked, what are our chances of identifying somebody with this? and in unison, they both said, "slim to none." >> if the killer had touched the blood, it might show his fingerprint, but the blood was on a porous bed sheet, another roadblock. >> getting prints on fabric is extremely difficult, pretty rare. there's only, you know, not very man...