Let the owner, rental agency, tow operators, wrecking yards, police impounds or any other facility who has the car know that they must make every effort to preserve the wreckage. Tell them that failure to do so will result in a lawsuit for permitting evidence to be destroyed.
If a third party or possible defendant is in possession of the wrecked car, and there is a threat of destroying it or repairing it, let your attorney know immediately. An experienced personal injury lawyer can request a temporary restraining order and a preliminary injunction to prevent destructive testing or alterations of the vehicle, have the wreckage delivered to a neutral party, and ensure there is no damage while the wreckage is being transported.[:]