John Doe's car was stolen, along with a copy of the key. The theif then sells the car and key to someone else. John Doe is walking down a sidewalk, and sees his car in someone's driveway. He checks the VIN, and it is indeed the same car. He was carrying another copy of the key (only one of his two copies was stolen, and he never took this copy off his keychain), unlocks the car, takes the new "owner's" belongings out and sets them on the ground, and drives home in his car. He had never reported the car as stolen. Is this legal?

John Doe's car was stolen, along with a copy of the key. The thief then sells the car and key to someone else. John Doe is walking down a sidewalk, and sees his car in someone's driveway. He checks the VIN, and it is indeed the same car. He was carrying another copy of the key (only one of his two copies was stolen, and he never took this copy off his keychain), unlocks the car, takes the new "owner's" belongings out and sets them on the ground, and drives home in his car. He had never reported the car as stolen. Is this legal?