Not normal, true. But not being normal is not the same as dangerous. They can get him for speeding, not being reckless, especially if he was alone on the road.
At that speed he can certainly react safely, Germans and airline pilots do it all the time.
Do they let 20 year olds with expired tags drive on the autoban? Or fly aircraft? Did this kid even have a motorcycle endorsement on his license? Insurance? If he didn't have money for tags you can bet he didn't have money for protective gear and his tires were bald as well. Mopped up the results too many times.
Darwin awards come cheap these days.