Prosecutors filed notice of their intention to seek the death penalty for the man accused of killing off-duty Officer Calvin Hall during an argument in the early morning hours of July 14. Hall died July 17—three days after he was shot.

According to the Pittsburgh Post Gazette, the man—identified as 30-year-old Christian Bey—is charged with homicide, possessing a firearm without a license, illegal possession of a firearm, and carrying a gun with an altered manufacturer’s number.

Related: Pittsburgh Officer Dies from Off-Duty Shooting

Officer Hall had been attending a party at a relative's house but decided to leave when the event got rowdy.