A 23-year-old is behind bars after police said he shot and killed his cousin during a fight Tuesday evening outside an East Lake apartment building.

Officers responded to the complex on Greenhaven Drive about 9:40 p.m., Atlanta police spokesman Officer Steve Avery said. They arrived to find an unconscious man with a gunshot wound behind the 1200 building, according to the incident report.

The victim, later identified as 33-year-old Richard Caldwell, was pronounced dead when paramedics arrived. His younger cousin, Adarious Caldwell, was taken into custody at the scene, Avery said. According to police, the two were involved in a fight outside the apartment that escalated to gunfire.

Adarious Caldwell, who has an Ellenwood address, was booked into the DeKalb County Jail shortly after 5 a.m. on charges of felony murder and aggravated assault. He remains held without bond, online records show.

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