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CHICAGO —A security guard who shot and killed a man outside a North Side bar this weekend was released from police custody without charges Monday.

Mario Dingillo was killed after an altercation outside a Roscoe Village bar early Saturday morning.

Family members said the fight was already happening when he arrived at Bluelight, a late-night bar near the corner of Belmont and Western. Family members said the security guard breaking it up mistakenly maced Dingillo.

But a witness told WGN News Dingillo started the altercation when he was denied entry, and reached for the security guard’s weapon.

The 30-year-old security guard turned himself in and was taken into custody. The Sun-Time reports he allegedly told investigators he fired the shots that killed Dingillo. He was released without charges.

Chicago police say the investigation is still open.