in the next town over, detective kenny elliot continued to work the jamie hart murder case.d spent the last year casting a wide net for possible suspects. you took dna from 70 people? >> i think 77. mainly people that were being booked into jail for violent crimes. anyone that was in the area that just didn't want to talk. we took dna from everybody that would give it practically. >> but he also had never taken his eye off her boyfriend, chuck cruz. there was just something that was bothering you about chuck cruz. >> there was a lot bothering me about chuck cruz. >> so the brazos county sheriff's office kept investigating chuck, even communicated with the d.a. about possibly convening a grand jury. chuck and his lawyer spoke to the detective on many occasions, and the detective continued to think chuck's behavior was suspicious. and that he still seemed nervous. did you ever think that maybe the reason that chuck cruz was acting this way was that you guys were coming down pretty hard on him, and he's lost his girlfriend. i mean, is there a way to act? >> i don't know, but he

. >> that same morning detective kenny elliot of the brazos county sheriff's office was summoned to the scene of a disturbing discovery. >> there was a young female, appeared to be in her early 20s. she was nude. she had extensive road rash on her entire body. and she was obviously deceased. >> reporter: a jogger spotted the victim in a ditch, nine feet from the side of the road. >> when i arrived there was probably half dozen officers here and they taped off the area, blocked. traffic, and at that point we started conducting a search of the area. we figured that she had been sexually assaulted and dumped here. less than a mile away, deputies discovered what was presumed to be the woman's clothing strewn across the entrance to an oil field. another nine miles from there- an abandoned vehicle -- its engine still running. >> there was blood on the car, and that raised suspicion. we sent a team over there to process the car. >> and inside the car, a drivers license that belonged to jamie hart. when detectives showed up at chuck's workplace that afternoon, he says his heart sank. >> there w