This is where the Smith case might overlap. He's literally the fly on the wall during the plotting of the terrorist act, as well as what trump was doing the entire time the attack was going on.
Not sure it that's possible? Fed. cooperation to lessen State charges? Given that this is a conspiracy case, he no doubt has a lot of inside info regarding the discussions that went on between trump, Graham, and other criminals in Congress.
I'd read that the prosecution may not be offering much in the way of deals since they have the goods on the defendants from other witnesses. Today I learned that the grand jury recommended many others to be indicted, but the Georgia chose not to do so. What wasn't mentioned is if the prosecution go after them later once these cases were resolved.