CNN Forensic Files May 31, 2015 07:12:00
>> but enhancing it would come at a price. >> that would destroy the dna profile of the blood the fingerprint was left in. >> investigators decided the risk was worth it. the print was sprayed with amino black, a chemical dye that reacts with the proteins in blood. >> we worked on it a little bit more and we decided that was as good as the print was going to get. >> the result was a partial print of a fingertip. investigators entered the print into the nationwide fingerprint database of known criminal offenders and the result was bad news. >> i was not able to come up with a match. >> that's b...