Authorities say John Pickett was arrested Monday on a misdemeanor battery charge.
Prosecutors say the altercation took place last January with 26-year-old Parker Beasley, who was handcuffed in the back of another officer's patrol car.
A police report says Beasley became agitated while the police officer was talking to him, and Pickett hit the suspect in the head through a car window.
The officer told investigators that Beasley had spit on him and started lunging at him.
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