The Atlanta Journal-Constitution
"An off-duty police officer killed a gunman who shot and injured four people inside a DeKalb County bar Saturday night, according to Channel 2 Action News.
Police said the gunman, whose identity has not been released, opened fire at the Trebol Billiards Bar on Buford Highway around 11:30 p.m. Saturday after some sort of argument, Channel 2 reports.
The off-duty officer who shot the alleged gunman was working security at the bar when the argument broke out. The officer called for backup. A second officer arrived just as one of the patrons involved in the argument started to fire a gun, police said.
One of the officers shot and killed the man, but not before the man shot four patrons. The injured people were taken to the hospital".