sirius e. underwoodthey ran the name, investigators found a son of a local preacher, who'd had some juvenile offenses but in the years since had redeemed himself. he graduated from zane state, got a good job with a local manufacturer and seemed to charm every woman he met. four days into their investigation, detective brady hittle found sirius at a girlfriend's place. >> i asked him if i could look at his cell phone. if i could take it back to the office, and download it. he agreed to let me do that. >> how'd he present himself? >> calm. >> he claimed he didn't know brandy was killed. just calm, cool, and collected. >> reporter: sirius came to the sheriff's office. >> we'll put it in airplane mode. >> reporter: while the squad's phone expert examined his cell, sirius explained how he knew brandy's husband josh. >> we went to zane state together. >> okay. >> i worked out with him and stuff like that. >> reporter: he said he hardly knew brandy. >> i didn't, like, meet her meet her, i seen her one time. >>