Oglethorpe's police chief died while at a conference in Savannah on Tuesday, according to Macon County coroner Brenda Oglesby.
She said Chief Harold Cannon was feeling poorly, collapsed and later died at a Savannah hospital.
"They're calling it a massive heart attack," she said.
Cannon comes from a law enforcement family. He's the brother of former Macon County Sheriff Charles Cannon and uncle of the current sheriff, Charles Cannon Jr.
His son, Wesley Cannon, is Byron's police chief.
So far, there is no word on funeral arrangements.