How has forensic science changed sexual-assault crime investigation?

How has forensic science changed sexual-assault crime investigation?

Richard Saferstein (Former Chief Forensic Scientist) gives expert video advice on: How has forensic science changed sexual-assault crime investigation?; How is semen studied in CSI?; What evidence from the victim of a sexual assault is studied in CSI? and more...

Three letters to that answer: DNA. Prior to the advent of DNA analysis, the forensic community really had no definitive way of tying a suspect rapist into an assault. And when DNA came along, the DNA fingerprinting technique allowed us to identify deposition of semen and hairs at scenes of sexual assaults with a particular individual. So DNA has really changed the complexity of sexual assault investigations.