>> the sad thing about it, later on that day her body was found at mchugh creek. >> whoa, whoa, whoa. what are you trying to say? >> well, like i said, i'm just down and your name has come up, like hundreds of names. >> why would my name come up? >> that's what i'm trying to figure out. >> reporter: what did you think? >> i thought we had our man. >> reporter: troopers looked up his new hampshire girlfriends. one said he casually mentioned that he could kill someone and get away with it. >> she thought he was blowing smoke. then he also told her i can't go back to alaska because of something i've done. >> reporter: she never asked him about that, but she told the troopers they might want to talk to her sister. >> and the sister told us, yeah, you know, he told me that he can't go back to alaska because he killed somebody. coming up -- bonnie's family learns investigators have made an arrest. >> i am immediately so fearful. can we get a conviction on just the dna?