I am not sure if Tammy's jury believed him. They may have just dismissed his testimony out of hand. I will say this, I was/am sure of both of their guilt, but I did have a hard time with his, "I lied to my mom" testimony" in TM's trial. It didn't ring true to me for some reason, but it didn't sway my opinion in TM's trial. I also dismissed his testimony. It just didn't have an effect on my thinking. It was all of the other evidence strung together that made me certain of the guilt. While it is circumstantial, there is a lot of evidence that points one way.