Police in Saxony-Anhalt, Germany have said that a file on Radim Passer, the Bugatti Chiron owner who filmed himself going 417 km/h (259 mph) on the Autobahn, has been forwarded to prosecutors.

The police department is “looking at the possibility of a banned car race,” the U.K.’s The Sun reports. If that’s the case, Passer could be facing up to two years in prison.

Passer filmed himself driving his Chiron last summer on Germany’s famed Autobahn. A video of the run was released late last year and the driver claimed that he took every possible precaution to make the stunt as safe as possible, choosing a straight bit of road with good visibility.

Read More: German Government Condemns Owner Of Bugatti Chiron Filmed Doing 259 MPH On Autobahn

Earlier this month, however, the German transport ministry publicly condemned Passer for the stunt, saying that it “rejects any behavior in road traffic that leads or can lead to endangering road users.” Moreover, the ministry pointed out that just because the highway has no speed limits, that doesn’t entitle drivers to do whatever they please. The law requires all road users to “only drive so fast that the vehicle is constantly under control.”

Regional transport chief Lydia Hueskens said that “there are certainly very serious doubts as to whether that happened” in this case.

The stunt and the backlash against it come as debate is reignited in Germany about whether or not speed limits should be imposed to currently unrestricted parts of the Autobahn. Largely being pushed for environmental reasons, any outrage may help convince people that the decision is sound.