A driver who struck and seriously injured a Denver police officer during a police protest last year in the city has been arrested.

Police announced Wednesday that 42-year-old Christopher Booker was arrested on charges of assault, forgery and attempting to influence a public servant.

At the time of the December protest over the police shooting in Ferguson, Missouri, police said it appeared that Booker had suffered a seizure before crashing into Officer John Adsit.

It's not clear whether that is still the case. Police planned to discuss the arrest Wednesday afternoon.

Court documents indicate that investigators sought Booker's medical records. It's not clear if he has a lawyer yet.