>> reporter: a red mazda? didn't johnny altinger drive a red mazda? wasn't it missing? mark twitchell hadn't said anything about any red mazda when he came down to the police station and talked to that detective the night before. said he forgot. really? why would he forget a thing like that? >> of course you don't want tunnel vision. big thing for homicide investigation don't get tunnel vision. keep an open mind. i pulled myself back. there's something fishy going on. >> reporter: clark invited twitchell to come down to the station for a meeting. 10:30 on a sunday night. and twitchell agreed. >> everything do