I, personally, think there is no chance for CE to talk now. He is in too deep and not smart enough to ask for a paddle.
Actually I think he will squeal like the pig he is. I think I heard in Texas he will be tried for murder even if did not help in it but helped hide it. With that hanging over his head, he will rat out his friend for lesser sentence. I think LE has most things covered, but getting him to testify will guarantee their case against the low life that killed a innocent woman in rage. With his testimony they will the full involvement of the Sister and Mother.