TULSA, Okla. — An Oklahoma reserve sheriff’s deputy charged with manslaughter in the shooting death of a man who was subdued on the ground has surrendered to authorities.

Robert Bates turned himself in Tuesday morning at the Tulsa County Jail. The 73-year-old insurance executive was charged with second-degree manslaughter Monday in the April 2 shooting.

Bates was released after posting bond. He didn’t comment to the media. He faces up to four years in prison if convicted.

Authorities say 44-year-old Eric Harris tried to sell an illegal gun to an undercover officer. They say Bates accidentally shot Harris after confusing his stun gun and handgun.