Definition - What does Attorney-Client Privilege mean?
Attorney client privilege is a rule of law that entails anything said by a client to their attorney is private. The attorney is obligated to keep the confidence of the client in most instances. In an instance where the attorney reasonably believes their client is going to cause harm to another person, they can inform law enforcement. However, anything that is said to the attorney about a former crime or instance is kept in confidence. It is the job of the attorney to do the best they can to defend a person being tried for a crime. That can only be done through receiving all of the information that surrounds the issue. Since all of the information might not paint the suspect in the best light, it is the responsibility of the attorney to sort through the statements and only convey on information that helps the client and minimize any damaging information that must be presented.
Justipedia explains Attorney-Client Privilege
The idea of attorney client privilege has always existed in law. There are times where a court may subpoena an attorney as a hostile witness and force them to tell something that was said to them in confidence, but it is an unusual occurrence. The idea that a person has a right to a fair trial is why this privilege exists.