upset, maybe as upset as he'd ever been. ever since he'd told cari that she couldn't move in with him she'd been texting, and emailing, and saying awful things, and making his life miserable. he tried calling her, but she didn't answer, and then, a little more than a week later the cops showed up at his auto repair shop. >> reporter: how did you find out they were coming? they just showed up? >> oh yeah. there was no warning. >> reporter: the detectives took him outside for a talk. >> and he tells me, hey, do you know cari? my first thought is, oh, that crazy one. yeah, what? you know? when did you see her last? oh, the morning of -- and, okay, so where is she now? no idea. >> reporter: the detective didn't seem to buy that. >> he was drilling me with them policeman eyes. them ones that are like, ah. you know? you feel like you're in the principal's office. >> reporter: yeah. where were you at 6:30? >> right. >> reporter: on that morning. >> yeah. >> reporter: and -- >> yeah. no, i had totally had the feeling -- >> reporter: i mean, she was at your house. >> yes. >> reporter: you were the last one to see her. >> and that was how he