My sim received a police car as a reward when he was promoted in the law enforcement track. He drove it to work just fine. But then, from the map view, I ordered the sim to go to the stadium to pick up a reward, and then to go home. Apparently, the sim did not take the police car that he'd gotten as a reward when he drove to the stadium, and now it is nowhere to be found! lol I've looked at the police station and the stadium, as well as his house of course. Is this a glitch that anyone else has had?

Have you checked his inventory or the family inventory?