left in that degraded state, the guys that i know worked on the case, come hell or high water, they're going to solve this. >> at the autopsy, the medical examiner concluded the cause of death was strangulation. and a rape test kit found evidence of sexual assault. >> once they were able to generate a profile, that's when everybody started looking for a possible suspect. >> investigators found a fingerprint on the water heater next to dana's body. it belonged to dana's estranged husband, mike. >> we had actually had a few problems, and she had actually been living a half a mile from here. the kids were staying here and she was staying there. >> when questioned by police, mike claimed he was with his children at the time of the murder. >> because we were with him that night. of course, when we got the phone call, we talked to him and there's no way that my dad did it or had anything to do with