Texas Department of Public Safety spokesman Lonny Haschel said a 26-year-old driver was traveling south on FM 741 at 11 p.m. Saturday and “for unknown reasons” crossed into northbound traffic.
The driver, identified as Warren Ray Patton, 26, of Kaufman, drove his BMW into a 2001 Chevrolet truck at FM 741 at U.S. 175. Guy Mundy Farley, 40, was killed.
Farley was later identified as the constable. He died at the scene. Patton was taken to Parkland Memorial Hospital with life-threatening injuries, Haschel said.
Neither vehicle had passengers inside, Haschel added.