that is when a new detective, shannon jensen, was assigned to the case. >> what i focus on when i am on a case, what drives me the most is the victims. >> jensen had been a competitive rower at cal berkeley before she enrolled at the police academy and joint law enforcement. she got to know helene through all of the pictures and information in the case file and she was hoping to get to know someone else. >> what do you know about your unknown suspect? you know it is a man, you know he is between the ages of-- >> we don't know his age. we know the witness says he was in his early 20s, but ultimately, no one else saw him. >> detective jensen said, the key to all of this was the dna profile. she decided to consult with a genealogist and upload the suspect's profile into a web set website called ged match, a website people use to connect with relatives. >> absolutely. they allowed law enforcement to upload kits of dna, and that is matched with kits that opt in that want to assist law enforcement. >> so, jensen started looking with dna of anyone similar to that of the suspect. this is not