Raymond Wong, 45, who works at the 94th Precinct in Brooklyn, is facing assault charges.
Investigators say he was involved in a dispute at the Prince Street, Flushing, bar Monday around 5 a.m. and may have been assaulted.
That's when he fired several shots.
No one was hurt.
Sergeant Wong has been suspended for 30 days without pay.
Three other men are in custody and charges are pending.
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