each other. >> reporter: shawn said he then dropped brooke off at her car in the parking lot where she'd left it. >> did he say he didn't know where she went after that? >> he was at home. he said he didn't know where she went. >> reporter: so had brooke met her killer there in the parking lot, or sometime later? perhaps she left to meet up with that other guy she'd been texting, daniel hawkins. but as far as investigators knew, shawn smoot was the last person to have seen brooke alive. and as investigators checked out his story, something wasn't adding up. >> so is this one of the first now where this guy's not being straight with us? >> it wasn't one of the first. it was one of the many. ♪ ♪