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MILS COUNTY (CBSDFW.COM) – A veteran Texas Highway Patrol officer has been killed in a one-vehicle crash.

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Sergeant William “Karl” Keesee died October 29 in Mills County. Officials say Keesee was driving southbound on U.S. Highway 84, near Goldthwaite, when his patrol vehicle left the roadway, crashed through a guardrail and landed in a creek bed.

The crash apparently happened around 11:30 p.m. and was discovered after a driver noticed debris on the road and contacted authorities. The cause of the crash remains under investigation.

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DPS Director Steven McCraw said, “Our state has lost a great man and outstanding peace officer, and our thoughts and prayers are with his family and loved ones during this very difficult time.”

Keesee, 49, joined DPS in 1990. He’s survived by his wife and two children. Funeral arrangements are pending.

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