The Atlanta Journal Constitution reports that:
The victim of Thursday’s U.S. Army Reserve post shooting and his alleged killer both apparently worked together, Army officials said Friday. Both men were full-time Army Guard reserve soldiers assigned to the Army Medical Professional Management Command, spokeswoman Maj. Lenora Hutchinson told the AJC.
It’s unclear whether they both were on-duty and working in the office building near the southeast corner of Fort Gillem when the shooting took place, but the alleged shooter was said to be in military uniform when he later turned himself in to police in Lake City, just south of the base.