Automobile Exception

The "automobile exception" is an exception to the general requirement of a warrant for searches and seizures under the Fourth Amendment.  Under the exception, a vehicle may be searched without a warrant when the evidence or contraband may possibly be removed from the scene due to the mobility of a vehicle and it is not practical to secure a warrant without jeopardizing the potential evidence.  For instance, the automobile exception allows an officer to make a warrantless traffic stop and search a truck of a vehicle when gun parts were observed in plain view on the front seat of the vehicle.