DETROIT -- The last of the three teenagers accused in the October 2008 shooting death of a Henry Ford student was sentenced Tuesday.

A judge ordered Devon Bell, 18, of Oak Park to spend 25 to 40 years in prison in connection with the October 2008 shooting death of Christopher Walker, 16, of Detroit.

William Morton, 15, of Detroit, was convicted in the killing and already sentenced to life in prison without parole. He was tried as an adult.

Derryck Brantely, 18, of Detroit was found not guilty.

All three teens were charged with one count of first-degree premeditated murder, three counts of assault with the intent to murder and one count of felony firearm.

The Wayne County prosecutor turned the investigation over to Michigan Attorney General Mike Cox and the Michigan State Police when she learned Brantley was the son of a Detroit police officer.

Walker, along with two boys and a girl, ages 15 to 16 years old, were shot while walking home on Evergreen Avenue after school on an October afternoon.

The black Mazda SUV used in the shooting belonged to Brantley’s family, police said.

Brantely’s attorney, Otis Culpepper, maintained that his client did not know anything about the shooting, only that he was asked by a friend to drive the other two teens to the school.

"He hears a gunshot, turns his head. At that point he says when he turned back the guys got the gun out and started firing,” Culpepper said.

Brantely told police he drove away, demanding that the two get out of his car.

“To me, it’s brave to tell someone with an AK-47 to get out of your car,” said Culpepper. “I know this is a terrible incident, a lot of people hurt, and the public is crying out for justice. No one wants to make it look like the police officer’s son got an easy break.”

Detroit Police Chief James Barren said the shooting was gang-related and was in retaliation for an incident that happened earlier in the day.

Students' Shooting Act Of Retaliation, Police Say