Investigators say a stolen gun from the district attorney's property room and a shooting victim's wake are connected.
DeKalb Police arrested 21-year-old Camenthia Dixon on Tuesday.
He is charged with two counts of obstruction of an officer, reckless conduct, carrying a concealed weapon and theft by receiving stolen property.
A department spokeswoman said Dixon was spotted walking into Carlos Henderson's wake.
Henderson was killed during a shootout with Delmetrius Heard in the parking lot of Victory of the World Church in Stone Mountain, moments after Ryan Guider's funeral ended.
Police said Dixon had the gun in his pocket at the time of his arrest.
It was later determined the gun had been reported stolen in another case in DeKalb County.
District Attorney Robert James told Channel 2's Erica Byfield the stolen gun was connected to a burglary at an offsite DA storage facility that occurred in June 2011.
James said the practice of storing evidence from closed cases offsite began before he became the district attorney. He also said he ended the practice once he learned about the break-in.
"Obviously I was concerned, even bothered, and I immediately stopped that process and we brought all the property back to where it should be, which is in a secure location in the courthouse," James said.
This is the first time the theft at the storage facility has ever been reported. James told Byfield the thieves took guns and drugs.
James said the facility is near Memorial Drive, but declined to give the actual street address.