one of the prosecution's key witnesses is a convicted felon named james mallory. >> james mallory. he's a rat. he's one of louisville's biggest -- he might be the biggest rat of all times. >> mallory, who knew jones when both men were housed together at louisville metro years earlier, was recently released from prison while serving a nine-year sentence for armed robbery. he was given probation after writing a letter to prosecutors claiming to have bombshell evidence in jones's case as well as some others. but jones says after mallory was released from prison he came to visit jones in jail and told him a different story. >> so he come visit me, what's going on, man? i ain't telling on you, whoo, whoo, whoo. but i'm like [ bleep ]. if you ain't telling on me, you need to go to court and tell, you know, the judge that the prosecutor is lying on you. >> when authorities learned of the visit, they gave jones a new charge -- tampering with a witness. >> so i get charged with tampering with him, but he came to see me and told me he ain't say nothing, they lying. >> mallory is scheduled to