Lawyers deal with legal issues, and different lawyers execute the law by applying their knowledge to the current situation. A number of lawyers work with divorce cases while others work in the crime department (such as murder, fraud, and assault). Criminal lawyers inform their clients of their responsibilities, while themselves prepare for the possible trial in court by researching statistics, regulations, and previous cases. Occasionally, they write legal documents and interview witnesses. Experts involved in a such crime can be consulted, and attorneys utilize their aid to further corroborate their investigation. A defence attorney supports the innocence of their client, while a prosecutor (also called a Crown attorney, or Crown counsel) prove the client is guilty. The defence attorney usually works in law firms while a prosecutor is in favour of the government. A defendant is innocent until proven guilty, therefore the prosecutor must find evidence to substantiate their cases. In the future, lawyers may become judges or law professors given their partiality.