DENVER — Christopher Booker, the man accused of colliding with Denver police officers during a walkout by East High School students down East Colfax Avenue in December, was ordered held on $50,000 bond by a Denver District Court judge Thursday morning.

Four officers on bicycles who were escorting the students were hit at Colfax and High Street. One of the officers, John Adsit, suffered critical injuries and spent 11 weeks in the hospital.

Investigators said Booker, 42, lost control of his car and accelerated, striking the officers and causing injuries to several of them. He said after the accident he suffered a seizure and didn’t remember the accident.

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

“We wanted to make sure that we combed through every medial record that we could get to this filing correct or this filing at all,” Denver District Attorney Mitch Morrissey said at a news conference Wednesday.

“It’s our position that he incorrectly or didn’t tell the truth about his medical condition on nine separate dates … that under our statute is forgery. It also is part of the other charges of attempting to influence a public official.”

Booker is being held for investigation for first-degree assault, vehicular assault, attempt to influence a public servant and forgery — all felonies. Booker will face 20 charges in all.

He was assigned a public defender, who noted the publicity the case is generating. The public defender said Booker would retain a private lawyer.

Booker did not speak at the hearing, though the public defender objected to a TV camera in the courtroom.

No further court dates were set.