in the next town over, detective kenny elliot continued to work the jamie hart murder case.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 h