CNN Forensic Files February 21, 2014 09:20:00
Michigan. since both murder victims had been sexually assaulted and investigators had dna of the killer, they wanted to know whether it was gorton's dna. so they put gorton under a 24-hour surveillance. they followed him to a local roller skating rink where he took his children. undercover officers watched gorton eat pizza and drink soda from a styrofoam cup. when gorton left, an officer rushed to the table, confiscated gorton's cup and took it to the forensics lab. the sample was tested immediately. >> dna is like any other biological molecule, subject to degradation. and one of the things th...