PUBLISHED: June 13, 2016 at 5:00 p.m. | UPDATED: August 18, 2019 at 6:59 p.m. FORT PIERCE — At least four regular customers at the Orlando gay nightclub where a gunman killed 49 people said Monday that they had seen Omar Mateen there before. “Sometimes he would go over in the corner and sit and drink by himself, and other times he would get so drunk he was loud and belligerent,” Ty Smith said. Mor