Quote from Lieutenant Disher in Mr. Monk and the Daredevil
Lieutenant Disher: Captain, we got a hit. The gas can by the burned-out car. It was bought 15 days ago at a hardware store, G&G hardware in Pacifica, eight miles from the crash site. Captain Stottlemeyer: And they don't remember who bought it. And he paid with cash. Lieutenant Disher: Of course. No security camera. No picture. But...? Captain Stottlemeyer: But? Lieutenant Disher: We can I.D. The car. We got the VIN number. It was on the radiator support bracket. Guess our boy must have forgot that. Captain Stottlemeyer: They always forget the radiator support bracket.