I think I would get disbarred if I were to turn a client in to the police. About the only way I can turn a client in is if I think that somebody is in immenant danger from serious bodily harm or death because my client has told me that they are going to hurt them. Then, I can alert the authorities about it and the potential victim. Other than that, I have to continue watching them drive on suspended/revoked licenses and doing all the other things that violate their probation/parole. Luckily, I have been doing a lot less criminal work lately, which suits me just fine.