A chicago police officer, jason van dyke, shot laquan mcdonald, a teenager, in an incident that has been the subject of various investigations and reports. The shooting was captured on dashcam video, which was later released, and has been the focus of documentaries and other media coverage. The incident has led to sentencing of the officer involved and ongoing discussions about changes in the chicago police department, with some reports suggesting that warning signs about the officer's record were overlooked.