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DENVER — The man who struck several Denver police officers with his car, critically injuring one, pleaded guilty on Thursday to vehicular assault and attempt to influence a public servant. Several other charges against him were dropped as part of the deal.

Christopher Booker, 42, told officers he had a seizure and lost control of the vehicle on Dec. 3, 2014, striking several officers who were on bikes escorting an East High School protest. The protest was related to the death of Michael Brown in Ferguson, Mo.

According to an arrest affidavit, Booker lied about his medical condition to get a driver’s license and should not have been driving.

Booker’s sentencing hearing was scheduled for Dec. 5. The charges Booker accepted were Class 4 and 5 felonies.

Officer John Adsit was critically injured when he was struck by Booker, requiring several surgeries to get him back on his feet 11 weeks after the incident. He still has not returned to work.

Two other officers were injured in the incident, but not critically.