A Dalhart man was killed in a one-vehicle rollover early Thursday on a farm-to-market road near Dalhart, the Department of Public Safety said. About 2: 50 a.m., Bernhard Giesbrecht, 21, of Dalhart, was driving a 2008 Cadillac STS east on F.M. 1727 four miles west of Dalhart and ran off of the left side of the road, the DPS said. Giesbrecht overcorrected when he tried to get back on the road, causing the Cadillac to rollover.