in prison try to swap information for a reduction in charges or less prison time. >> quinn was incarcerated for a crime that bore a marked similarity to dana's murder. >> he was also in prison for raping a woman and tying her to a tree. >> quinn was free at the time of dana's murder and fit the eyewitness description of the killer. >> the police got his mugshot, put it in a photo lineup, showed it to diane harris, who as you'll remember is our lone eyewitness. diane actually picked russell trevor quinn out of a photo lineup as being the person she came in contact with. one of dana's friends says i've seen this man in the shop before. the police are able to put him in a car not dissimilar to the one seen near the scene. >> but this turned out to be another dead end when his dna didn't match the biological evidence from the crime scene.