>> i know. do you still love me? >> yes, i do. >> if you did have anything to do with her dying, was it because you loved me? >> i didn't have nothing to do with it. no. no. no. i had nothing. my hands are clean as they can be. >> so, infidelity? yes. murder? hmm, didn't sound like it. >> we could prove that he was an adulterer. but we was trying to prove the murder. >> guess there's no crime in being a lying sack of you now -- know what. >> it's not against the law to have a mistress. now the corporal and the sheriff reverted to standard procedure. >> they followed up every tip, tracked down every tenuous lead, knocked down numbers. somebody called scott from teresa's cell phone that morning whether he heard it or not. the investigation dragged on. >> weeks and months dragged by and there was nothing.