A plumber had a dispute with a homeowner about the amount owed on a plumbing job. The homeowner paid what the plumber demanded, but the plumber believed that the homeowner stole his drill as a way to get back at him. The plumber asked his attorney if it was illegal to enter a house to take something that he believed belonged to him.

The attorney incorrectly told him that it was not. The plumber then entered the homeowner's home one night without permission and found a drill, which he quickly realized was not the drill that belonged to him. The plumber then left without taking anything, locking the door behind him. This jurisdiction follows the common law without modification.

Is the plumber guilty of burglary?