 This U.S. Supreme Court also used previous precedent derived from previous Supreme Court cases – such as the "Gerstein v. Pugh" (1975) case – to arrive at their final decision.This lawsuit was filed in 1987 by the plaintiff – Donald Lee McLaughlin – against the County of Riverside (California).He asked the United States District Court (Central District of California) to issue an injunction ordering that the County stop its policies on warrantless arrests, arguing that the practice may be unconstitutional.