He is going to prison for the rest of life, no matter what, he he knows it. The Feds are foolish to offer him any "deal" that allows Ruth (who is a co-conspirator to this scheme) get away Scott free. She even lobbied new investors to give them their money (knowing full well it was going down a black hole) and pressured charity groups to do the same.
Ruth wants her fair share. Then, she can give more money to Democrats over the years with what is left over. Chuck Schumer needs another pile of their money.