The man responsible for Friday's fatal shooting at an Air Force base in Texas was not only an enlisted airman but an FBI veteran, the Washington Post reports. Officials have identified the shooter as 41-year-old Tech. Sgt. Steven Bellino, who joined the Air Force last June and was training to become a pararescueman, which would make him part of an elite unit in Special Operations. Prior to joining the Air Force, Bellino spent less than two years with the FBI, largely working out of a field office in New York. While officials have not identified the victim, he was reportedly Bellino's commanding officer. The shooting appears to have been a murder-suicide, with Bellino killing himself after shooting the victim. Officials believe the shooting was the result of a workplace issue and is not terrorism related. (More shooting stories.)