A Dunnellon man was arrested on Tuesday morning for DUI after fatally hitting a pedestrian in Citrus County, authorities said.Timothy Tyler Corcoran, 32, was driving a Nissan Xterra northbound on U.S. Highway 98 at about 3 a.m.N orth of West Ashburn Lane, Corcoran hit a male pedestrian who was walking in the roadway, the Florida Highway Patrol said. The unknown pedestrian was killed at the scene. Corcoran was later arrested by FHP troopers for DUI.  ...read more read less