Full title/header: Tattooed trenchcoat-wearing ex-Marine, 28, is identified as gunman who massacred twelve people during student night at country bar: Suspect killed himself after hurling smoke grenades onto dance floor and slaying cop in California xxx xxxx, 28, opened fire at Borderline Bar and Grill in Thousand Oaks, Southern California, at 11.20pm He was dressed in all-black and let off at least 30 shots from a pistol with an extended magazine Witnesses said Long also let off smoke grenades to confuse the terrified crowds In April, police and mental health specialists were called to Long's home after a disturbance but...