An attorney for an Oklahoma reserve sheriff's deputy charged with fatally shooting a suspect as he lay on the ground says the man will turn himself in.

Tulsa attorney Corbin Brewster says Robert Bates will be booked Tuesday after the district attorney formally issues an arrest warrant. Brewster says attorneys have already planned bond for the 73-year-old Tulsa County Sheriff's Office reserve deputy.

Bates was charged with second-degree manslaughter Monday in the April 2 shooting death of 44-year-old Eric Harris. He faces up to four years in prison if convicted.

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