So, back to the original question, "what do they have on Roberts"? The answer is all of the above AND there are detailed recordings of Justice Roberts discussing, suggesting, negotiating, and approving the replacement for Justice Antonin Scalia, PRIOR TO HIS "SUDDEN" DEATH.
There is zero ambiguity on these recordings, plans and methods to remove (murder) Justice Scalia changed repeatedly. As did the timetable because of the success of then candidate Trump.
EVERYONE WAS WEARING A WIRE ON EVERYONE. They knew all of this was highly illegal so they sent emails to themselves as proof, they recorded conversations, had "insurance files". All to provide themselves with an alibi, a "get out of jail free card".
destroyed as much as possible, General Flynn, myself, and many many others.