it was sheriff tony spurlock. >> he said we want to tell you that we found the murderer and so i lost that after 40 years there would be justice served and it was just hard to comprehend. >> because it's a relief but it's also reliving? >> exactly. >> lieutenant tommy barrella began escorting clanton back to colorado, as they spoke, the detective began gaining his trust. you're building a reporter with this guy. >> kind of, yeah. i'm just a personable guy. >> their suspect had clammed up in that interview room, then, suddenly seemed to have a change of heart. he wants to talk? >> he wants to talk and they want to talk, my gosh, you have to let them talk. >> as they drove to the airport, tommy barrella grab his iphone and pressed record. my name is lieutenant tommy barrella and jim advised me that he'd like to talk about the crimes that he is being accused of. >> he told tommy barrella that he wasn't surprised when detectives asked them about helene. >> because i knew that was gonna come up and get me one day. >> why was it gonna come up and get you? >> i killed the girl they're accusi