NASHVILLE, Tenn. (WSMV) - Metro Nashville police say their investigation into a shooting outside the Greyhound bus station is not over, and the case will receive a full staffing with the District Attorney’s Office.

Douglas West, 39, shot 22-year-old Jacorey McIntosh during a confrontation outside the downtown bus station Sunday morning, police said.

McIntosh was treated for gunshot wounds to his hip and leg, then released from the hospital and booked into jail Sunday night on a felony aggravated assault charge. A judicial commissioner set his bond at $10,000.

Police said West worked for STM Security and was at a shift change with another security guard when the fight began.

According to police, West told McIntosh to leave the bus station about 45 minutes before the confrontation. Investigators said McIntosh later approached West as he spoke with a co-worker, threw hot coffee into his face and began striking him.

Police said West was knocked to the ground twice. They said McIntosh got on top of West, punched him and used a firearm magazine that had fallen from West’s security vest to hit him in the head.

West had burns and contusions to his face and head when detectives interviewed him, police said.

Police said no weapon was found on McIntosh. The magazine police say he used to hit West was recovered from the ground.

Metro police said a surveillance camera captured the entire confrontation. Investigators said the footage shows McIntosh throw coffee at West, charge at him twice, get on top of him and throw several punches.

Police said West got up after being knocked down a second time and drew his gun. McIntosh then made what police described as a slight movement toward West again, and West began firing.

Whether or not West faces charges centers on Tennessee’s self-defense standard for private security guards.

Vanderbilt law professor Christopher Slobogin said security guards are not state employees and are generally held to the same self-defense standard as private citizens. Under that standard, a person does not have a duty to retreat but may use only force proportionate to the threat.