A Somerville man died on Tuesday, June 18, in a two-vehicle collision on State Highway 6 in Grimes County, and DPS troopers are investigating.Derrick Coleman, 48, was pronounced dead at the scene by Grimes County Justice of the Peace Mark Laughlin.The accident occurred at 11:18 a.m. when Coleman, driving a 2018 Mercedes Benz car, turned right from F.M.2 onto State Highway 6, headed southbound in…