A Maryland man held on charges of being a felon in possession of a firearm also is suspected of being one of the gunmen in the December shootout and robbery of $245,000 from an armored truck in Laurel, the FBI confirmed.

Derrick Simmons was indicted on the gun charge Jan. 5 after Laurel police discovered a pistol in his Greenbelt home Dec. 4, the day after authorities suspect he and others robbed the armored truck outside a Bank of America. The suspects exchanged gunfire with guards as they fled in Simmons’ black Chevrolet Suburban, police said. The sport utility vehicle’s back window was blown out by the gunfire.