Ordinarily, when a police officer seeks to enter a person's vehicle without their permission, they need to have some reasonable suspicion that its occupants have engaged in criminal activity. One exception to this rule is the "community care-taker" exception. This doctrine dates back to a 1973 Supreme Court Case called Cady v. Dombrowski. In that case, a police officer took custody of the defendant's vehicle following a traffic accident so that he could move the vehicle out of oncoming traffic. Upon learning that there was a revolver in the trunk of the vehicle, the officer opened the trunk and removed the gun.