Tennessee v. Garner, 471 U.S. 1 (1985), is a civil case in which the Supreme Court of the United States held that, under the Fourth Amendment, when a law enforcement officer is pursuing a fleeing suspect, the officer may not use deadly force to prevent escape unless "the officer has probable cause to believe that the suspect poses a significant threat of death or serious physical injury to the officer or others." It was found that use of deadly force to prevent escape is an unreasonable seizure under the Fourth Amendment, in the absence of probable cause that the fleeing suspect posed a physical danger.