jeff capps: her body had kind of been propped up onto the bed. even law enforcement, they felt, what do we have on our hands here? craig melvin: there's growing danger because police are looking in the wrong place. i lived to tell, and nobody believed me. this monster is walking free while they're wasting their time on me. craig melvin: can the killer be caught before he kills again? it makes you realize how fragile your life is and that anybody can take it. [music playing] welcome to "dateline." a killer was on the loose in a texas college town, leaving students and their parents terrified. with the shocking discovery of jamie hart's body, investigators were desperately trying to piece together clues. was the young woman connected to her killer? or did police have an active predator on their hands? here's andrea canning with "the face of evil." looking looking back now, this woman almost didn't make it. i said, if you keep doing this, you're going to kill me. and he just said, do you think i actually care about that? is that when you feel like y