Somervell County Sheriff's Department officers investigating the death of a man found dead Friday in a pickup truck at a roadside park are still awaiting an official ruling on the cause of death.

The man's body was discovered late Friday morning in a white pickup truck parked at the back of the roadside park on U.S. Highway 67 just east of the Brazos River bridge.

Lt. Anders Dahl of the Somervell County Sheriff's Department has been investigating the death along with the Texas Rangers.

The man was middle-aged and Hispanic. He had a gunshot wound to the head and was pronounced dead at the scene.

A small-caliber revolver was found in the truck, Dahl said.

The body was taken to the Tarrant County Medical Examiner's office to determine the time and cause of death.

The man's name has not been released. He was from Cleburne and had family in Stephenville and Cleburne.

Based on interviews with family members, the man "had some issues related to his family and his marriage," Sheriff Greg Doyle said.

No knows why the man was at the roadside park, he added.

A witness who was checking trash cans at the park discovered the body in the driver's seat of a white Ford F-250 truck and called authorities at 11:20 a.m.

The truck was parked at the back of the park under tall oak trees. The truck's doors were closed, Dahl said.

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