Police learned that Palmer had applied, but had been rejected, for permits to buy two handguns at a Savannah gun show in August.
“They learned that he falsified some information and was denied the guns,” Cross said.
The false information related to previous mental health issues, Cross said.
In 1993, Palmer was convicted of shooting a man outside a Baltimore mosque and pleaded guilty, claiming mental illness.
A Fulton County Superior Court judge determined that there was probable to charge Palmer with murder, felony murder — the commission of a felony that results in a person’s death — aggravated assault with deadly weapon and possession of a firearm during the commission of a felony.
A Fulton County grand jury will be convened next month to hear evidence and determine whether Palmer should be indicted.
He remains in the Fulton County Jail without bond.