ST. LOUIS — A man who police say has admitted to being the getaway driver during an ambush shooting that wounded a uniformed St. Louis police sergeant has been charged with felony assault on a law enforcement officer.

Prosecutors also charged 27-year-old Edward Davis on Wednesday with armed criminal action in connection with the pre-dawn gunfire Tuesday that injured the officer as he sat in his personal car. That 39-year-old officer, a 16-year St. Louis police veteran identified in court documents only as “Sergeant L.,” was treated at a hospital and released.

Another suspect, an unidentified 18-year-old, surrendered to police Wednesday and has not been charged. His attorney, Jermaine Wooten, told The Associated Press today that his client was in the backseat of the car and had no role in the shooting.

“He’s as much a victim as the police officer,” Wooten said of the teenager, who he said has never been in trouble before. “He was just riding and had no idea what was happening until all the shots were going off.”

Wooten said he anticipates also representing one of two other suspects who as of this morning were at large, and that he planned to arrange that man’s surrender.

The officer was working security as a second job in the city’s tony Central West End neighborhood when a gunman opened fire on the officer’s private vehicle.