A gaming establishment's officers or employees have the legal authority to question anybody they believe may have cheated. (During this time, they will probably also review any surveillance video over or near the applicable gaming tables or slot machines.) If the casino employees have probable cause to believe that the suspect actually did cheat, they may detain them in a reasonable manner and for a reasonable length of time until the police arrive. In Las Vegas, gambling cases are usually investigated by Las Vegas Metro's Financial Crimes Unit.