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NORTH HIGHLANDS, Calif. (KTXL) — Deputies arrested a 34-year-old man Thursday night after he was suspected of killing his grandfather with a baseball bat.

Frank Swanson, 34, was arrested for homicide.

Around 5 p.m., the Sacramento County Sheriff’s Office Communications Center reports it got a call from a man now identified as Frank Swanson in North Highlands who claimed he had struck his grandfather with a baseball bat. Swanson said his grandfather was already dead.

Deputies arrived at the caller’s location on Bolivar Avenue, near San Martin Street, where they found him in the road, according to the sheriff’s office.

In the North Highlands home, the sheriff’s office says deputies found a 78-year-old man with trauma to his body. They attempted life-saving measures before he was taken to an area hospital, where he was pronounced dead.

Deputies arrested Swanson and he was booked into the Sacramento County Main Jail.