Richard A. Wiley, 55, had been sought by authorities on child molestation charges since Saturday morning, according to Bloomingdale police Chief Thomas Gossett.
Shortly before 11 a.m. Wednesday, a Bloomingdale officer, driving an unmarked vehicle, spotted Wiley in a black Chevrolet pickup truck in Port Wentworth, Gossett said.
The officer summoned marked Port Wentworth police units; the truck pulled over on Georgia Highway 21 at the busy Interstate 95 interchange.
As officers approached, Wiley "immediately placed the gun to his temple," Port Wentworth police Capt. Matthew Libby said, explaining that for about two minutes, the police did their best to convince Wiley to put the gun down. "We're very lucky nobody else was injured or killed."
The incident shut down Ga. 21 for much of the morning.
Gossett didn't disclose details of the child molestation charges, but he did offer a grim assessment of the suicidal result.
"It's a terrible outcome, bad for everybody involved," Gossett said. "It's not what we wanted, obviously."