JACKSONVILLE, Fla. -

Two 21-year-old men were sentenced recently in the 2011 armed robbery and murder of another man.

Antoni Knight and William Holmes pleaded guilty earlier this year to second-degree murder and armed robbery in the killing of 20-year-old Antwan Johnson.

Knight was sentenced to 46 years in prison for the crime. Holmes received 26 years in prison.

In May 2011, Knight, Holmes and a third co-defendant, whose case is still pending, held up Johnson, who was sitting in the driver's seat of his car, according to prosecutors. After robbing Johnson of $10 and some marijuana, Knight shot Johnson in the head and chest, prosecutors said.

They said Holmes, who was acting as lookout, then helped Knight move Johnson's body to the passenger seat of the car. Knight drove the victim's car to a nearby ditch, where they dumped Johnson's body, prosecutors said.

They said Knight later set Johnson's car on fire in a church parking lot.