If it's during the day and you feel safe, stay with the animal so the police officer can find you easily. Maybe put your car flashers on.

It is heartbreaking to hear your animal like that. Normally, the cat will come down on his own if you leave tuna or a can of food at the base of the tree.

If it were me, I would go to some homes in the area of the accident and try to find the owners -- if it was not late at night, and if it was safe to walk around.