Police said three people were witnesses to Christopher Levi Parker gunning down Robert McClure at the victim's Hixson home on Saturday.
Parker, 23, of 1006 Nadick Lane, was taken into custody on Sunday and charged with first-degree murder and aggravated assault. His bond is $750,000 on the murder charge and $100,000 for the aggravated assault.
Andrew Biro told police that Parker and McClure had a prior altercation, and that Parker wanted to go to McClure's house at 1300 Hixson Ave. He said a man named Ty also went with them.
He said all four were in the living room of McClure's residence when Parker became angry. He said Parker pulled a gun from his waistband and pointed it at McClure's head. He said Parker began yelling at McClure, then he pulled the trigger. The victim slumped to the floor with blood coming out of his head and pooling on the floor.
Biro said he and Parker then left. He said Parker threatened to kill him if he told what happened.
Police found the body of McClure near the front door of his residence.
Hixson Avenue is off Norcross Road.