>> he knew doug carlisle and james henrikson. why was he here?just in case they were wondering, that he didn't have anything to do with the murder. >> did you drive somebody up there? >> no, no, no, i had nothing to do with it, nothing. >> but burbridge had seen a thing or two. he pushed. >> we're going to start talking about some things honestly. and i'm going to have a heart to heart with you. >> okay. that's fine, that's fine. >> people tell me you are the shooter. >> i say hell no. you know that night i was in wofford city, north dakota. >> you went after him pretty hard, accused him of murder? >> i did. >> how did he respond to that? >> he denied it and didn't even flinch. >> did you think he was your guy? >> i did not think he was the guy. >> why did you do that? >> sometimes you do things, put them under pressure to see their reaction. and he did not flinch. >> the detectives asked delao to take a polygraph, and he did. did he pass the test? >> yes, he did. >> so curious, certainly, but a real lead? or a dead end? hard to know. so burbridg