Body camera video released Monday shows a St. Louis police officer shoot a 17-year-old in the back of the head as he fled, contradicting an earlier police statement that the teen pointed a gun at officers. Al Watkins, an attorney for the family of Emeshyon Wilkins, obtained the video as part of the discovery process in a federal lawsuit against the police department. Police said Monday that the department now sends a member of the department’s body-worn camera unit to such scenes so that footage can be reviewed by investigating commanders before detailed public accounts are provided.