Trooper Gary Rozzell, Texas Department of Public Safety public information officer, said the two were responding to an accident in which a woman had struck a deer on South FM 1885.
Rozzell said John Vandyke, 30, driver of the brush truck, was thrown from the vehicle after it left the roadway. When the truck hit a culvert, it rolled over Vandyke before coming to rest on its top. Cody Low, 18, was a passenger in the vehicle.
Vandyke was taken by ground ambulance to Harris Hospital, Low was taken to Weatherford Regional Medical Center.