If you find a car that is parked illegally, you should first contact the local police department. Depending on the severity of the infraction, they may dispatch an officer to remove or ticket the vehicle. If it is determined that the vehicle has been abandoned and is not being used by its owner, then it can be removed by a tow truck service with authorization from either your city or town's parking authority or law enforcement agency. Make sure to obtain all necessary paperwork and documents required for this process before contacting them to ensure a smooth removal.