Question: If a lawyer had a client who was guilty of murder and the lawyer broke the ethical boundaries and told the District Attorney, what would happen to his client and what would happen to the lawyer?
Lawyers are not allowed to break attorney client confidentiality. The lawyer who did so in such a serious case would end up in serious trouble. The state bar would file a complaint against the attorney. There would likely be a hearing. The attorney would be punished. The punishment could range from a slap on the wrist to disbarment (loss of license.) I wouldn’t be too surprised if in such a blatant case the lawyer received a punishment on the higher level of the scale. The state bars tend to punish lawyers who harm their clients very severely.