Handcuffs are restraint devices designed to secure an individual's wrists in proximity to each other. They comprise two parts, linked together by a chain, a hinge, or rigid bar. Each cuff has a rotating arm which engages with a ratchet that prevents it from being opened once closed around a person's wrist. Without the key, the handcuffs cannot be removed without specialist knowledge, and the handcuffed person cannot move their wrists more than a few centimetres or inches apart, making many tasks difficult or impossible.

The Los Angeles County Sheriff's Department (LASD), officially the County of Los Angeles Sheriff's Department, is a law enforcement agency serving Los Angeles County, California. LASD is the largest sheriff's department in the United States and the third largest local police agency in the United States, following the New York Police Department, and the Chicago Police Department. LASD has approximately 18,000 employees, 9,915 sworn deputies and 9,244 unsworn members. It is sometimes confused with the unrelated Los Angeles Police Department which provides law enforcement services within the city of Los Angeles, which is the county seat of Los Angeles County, although both departments have their headquarters in downtown Los Angeles.