Robert Swackhammer Jr. pleaded guilty to voluntary manslaughter and tampering with evidence.
Swackhammer shot his father, Robert Swackhammer Sr., in the head on Sept. 27, 2011. He died at the scene.
Swackhammer Sr., 74, was a grandfather of seven.
According to the Franklin County Sheriff’s Office, Swackhammer Jr. was arrested the month before the shooting for allegedly carrying a concealed weapon without a permit.
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September 28, 2011: Investigators Say Son Pulled Trigger On Father

