Grand jury clears Cobb County officer in deadly shooting of 17-year-old WSBTV.com News Staff Replay Video UP NEXT After a day of presentations and deliberation, a grand jury has cleared the officer involved in the deadly shooting of a Cobb County teen. Vincent Truitt, 17, was shot twice in the back by a Cobb County police officer following a July car chase near the Six Flags Over Georgia amusement park. Truitt died at Grady Memorial Hospital the next day. Investigators have contended that Truitt presented a threat to the officer when the teen got out of the car holding a gun.