BOSTON - A decorated Boston police officer remained in a medically induced coma Saturday, a night after he was shot in the face during a traffic-stop confrontation that ended when other officers fatally shot his attacker, the city's police commissioner said.

Officer John Moynihan, 34, was struck just below his right eye and the bullet remains lodged below his right ear. He was listed in critical condition, Commissioner William Evans said.

Evans said Moynihan is undergoing tests and is being monitored for bleeding in his brain. "We are hoping and praying there's not further damage," Evans said. "He's a fighter."

Moynihan and five other gang task force members, traveling in two cars, stopped a car Friday night after reports of shots fired, Evans said.

The commissioner said the officers had blue lights flashing but had not pulled out their weapons. He said video from the scene shows Moynihan approaching the driver's door, and the suspect, Angelo West, 41, suddenly pull a gun and shoot him at point-blank range.

Evans said West continued firing at the other officers as he tried to run away, emptying his .357 Magnum handgun, and was killed at the scene when police returned fire. West had a violent criminal past with several gun convictions, according to Evans.

A woman driving by in a car suffered a flesh wound and is recovering, Evans said. Three officers were taken to a hospital with stress-related problems.

Mayor Marty Walsh said Moynihan and the other victim are in his prayers.

"I have spoken with Officer Moynihan's family and Commissioner Evans and I am hopeful that under the experienced and talented team at Boston Medical Center the officer will continue on a strong path to recovery," Walsh said.

Moynihan, 34, is on the police Youth Violence Task Force and is a highly decorated military veteran, Evans said. He is a former Army Ranger who served in Iraq in 2006-07 and was honored at the White House in May with the National Association of Police Organizations TOP COPS award. Moynihan received the award for being one of the first responders in Watertown after the April 2013 gun battle with the Boston Marathon bombers.

Moynihan had helped Transit Police Officer Richard Donohue, who was shot in the leg and nearly bled to death when police tried to apprehend Tamerlan and Dzhokhar Tsarnaev, Lt. Michael McCarthy said.

Evans said Moynihan is single, and his girlfriend, sister, and other relatives were at the hospital along with clergy members.

Two other people in the car with West have not been charged in the shooting, Evans said, but are being held on unrelated outstanding charges.

District Attorney Daniel Conley said the top prosecutor from his office will investigate the killing of West as state law requires and it will be "completely transparent."