Protest across Chicago as black teen is shot 16 times by white cop, as he lay on the ground

The video of the shooting of 17-year-old Laquan McDonald (pictured inset) has been released and it's chilling. The dashcam footage shows a white police officer, Jason Van Dyke, (pictured inset right) shooting Laquan dead on the streets of Chicago. He shot Laquan 16 times at point blank range for 13 seconds as the young man laid motionless on the ground with smoke rising from his back.

The police officer claimed he felt threatened by the teenager and that was why he used his gun but he has since been charged with first-degree murder.  

Yesterday, hundreds of protesters took to the streets after watching the video of the shooting which was released last night. They chanted '16 shots' and formed human blockades across roads in Chicago. Other demonstrators gathered outside police stations

Laquan McDonald (right) is carrying a small knife but can be seen walking away from police officers as they approach him

Dashcam footage shows McDonald after being shot by Van Dyke and falling to the ground

Van Dyke later walks up to McDonald's dead body on the street and kicks the knife he was holding out of his hand

Van Dyke continued to shoot even as he lay motionless on the ground