The Police Car is currently a dysfunctional vehicle and dynamic event in DayZ Standalone. They only spawn randomly all over Chernarus as wrecks much like Helicopter Crash Sites, although potentially easier to come across. They commonly spawn Police loot including MP5-Ks and Makarov IJ70s.
Before the outbreak they were used by the Chernarus Police Department.
Note: There can only be 10 police cars on the map at all times, with default settings.