How'd he drive with no number plate? The cops here in Oz would have spotted that in a second.
The story I heard was that you only need a license plate in the state he lived in after having a new car for a month so he had some kind of special deal with the car dealership to get a new car every month and thus not require a license plate.
Why did he do it? Apparently he didn't want people to learn what his number plate was an identify him/his car. Silly really since a car without a number plate stands out more and it wouldn't take long for the rumour mill to come into action either.