reasons why. i'm not going to do it just because she says she didn't do it. >> reporter: shannon and her attorney were emphatic that jermeir was the killer and also said that even now, months after the murder, he was making threatening phones calls to shannon, telling her to stay silent about his role. >> i told them that i'm more than willing to look at anything they have if they want to bring me something. but i can't just accept her word for it. that's the problem i'm having, i need some kind of proof to back her up. >> reporter: so the prosecutor challenged shannon, bring me proof. he could not have imagined what was coming next. sex. lies. and audiotape. and maybe shannon crawley's ticket to freedom. a killer conversation. >> i spent four months in jail because of you, because you lied. >> i told you to shut the [ bleep ] up. >> now says shannon's father