Atlanta police have detained a woman after an argument ended in a deadly shooting early Thursday morning in Peoplestown.

A man was killed in the shooting at an apartment complex on Vanira Avenue shortly after midnight. The woman, an acquaintance of the victim, was being questioned and has not been charged, police said in a news release.

The victim was identified by the Fulton County Medical Examiner’s Office as Mario Peterson, 43, of Atlanta. Investigators believe the two argued before shots were fired, but it was not immediately clear what caused the argument.

— Please return to The Atlanta Journal-Constitution for updates.

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U.S. Sen. Jon Ossoff waves to a crowd of supporters during his "Rally For Our Republic" event on Saturday, July 12, 2025, inside the Kehoe Iron Works building at Trustees Garden in Savannah. During his speech, Ossoff said, "What’s happening to our country right now should chill us to the bone." (Sarah Peacock for the AJC)

Credit: Sarah Peacock for the AJC