CHICAGO -- A Chicago police officer is being held without bail in the fatal shooting of a teenager.
Jason Van Dyke is charged with first-degree murder in in the death of 17-year-old Laquan McDonald. McDonald was shot 16 times on Oct. 20.
Charges were announced Tuesday as the city prepared to release a squad-car video of the shooting. Van Dyke requested protected custody and is now incarcerated in the Cermak hospital building. If convicted of first degree murder, Van Dyke faces a sentence of between 20 years to natural life in prison
The video shows McDonald armed with a small knife and walking away from officers. Van Dyke opens fire from about 15 feet and keeps shooting after the teen falls to the ground.
An autopsy says he was shot at least twice in the back.
Some worry the images could lead to unrest as in Baltimore and Ferguson, Missouri, after police-involved deaths.