As we reported ... Iced Earth's founder turned himself in to the feds last month, and the FBI claims Schaffer sprayed Capitol police with "bear spray."
Schaffer's facing 6 charges in connection with the insurrection ... including violent entry, disorderly conduct in a Capitol building and engaging in an act of physical violence in a Capitol building, among others.
With Stu and Luke out of the band, Iced Earth is down to just 2 members ... drummer Brent Smedley and Schaffer. Meanwhile, Iced Earth guitarist Jake Dreyer is distancing himself from the band.
Jake, whose IG profile still says he's the band's lead guitarist, tells TMZ ... Iced Earth employed him from 2016 to 2018 but now he's focused solely on playing with his own band, Witherfall. Jake says he enjoyed his time with IE, but "it's unfortunate how this tragedy unfolded."