MSNBC Dateline Extra October 14, 2019 03:32:00
Goin' on. >> reporter: three days after the murders, the indiana state police called david in for a second interview. he sat down with two cops he knew well. he'd been sharing coffee and cases with them for years. >> because of the high profile of this case and because obviously as you know, well, the notoriety, we're doing this all by the numbers. >> reporter: this time the tone of the interview had changed because now, the investigators did have a working theory of the murders -- and the evidence they were gathering pointed to none other than david camm as the killer. their one time fellow t...