Ricardo Hayes, then 18, was shot and wounded in the arm and chest by an off-duty police officer, Sgt Khalil Muhammad. The teenager's family had reported Hayes missing only hours before, advising police he had developmental problems and autism. The police officer is heard on a 911 call saying that Hayes had a gun and he shot in self-defence, but the family is now suing for excessive use of force. The incident happened in August 2017 but the video has only just been released