The Brief A two-vehicle crash on State Highway 6 in North Texas left two Granbury residents dead and a truck driver injured on Friday afternoon. Douglas Hartley, 56, and his passenger, Autumn Campbell, 44, died at the scene after their SUV crossed the center line and struck a semi-truck. The exact reason why the SUV crossed into oncoming traffic remains under investigation by the Texas Department of Public Safety. A head-on crash on a North Texas highway left two Granbury residents dead and a truck driver injured, the Texas Department of Public Safety announced. Fatal head-on crash What we know: The crash happened Friday afternoon at 3:41 p.m. on State Highway 6 at the intersection of Farm to Market Road 1853, according to a preliminary report by DPS Sgt. Marc A. Couch. Investigators say Douglas Hartley, 56, was driving a 2016 Dodge Grand Caravan northbound on the highway when the vehicle crossed the center dividing line. The SUV crashed head-on with a southbound 2000 Freightliner truck tractor towing a dirt semi-trailer. Hartley and his passenger, 44-year-old Autumn Campbell, both died at the scene. Authorities say Campbell was not wearing a seat belt and was ejected from the vehicle during the impact. Hartley was wearing a seat belt. The crash is under investigation. #fox4news #crimewatchdallas