There is apparently a lot of witnesses to the case. One of them that witnessed before the Congress said that there where talks about this in the white house prior to january 6. She also said that he demanded to be driven to the congress that day and apparently he took chocked a secret service employee since he did not do so…
Trump knew what was going to happen and calling his speech that day vague is really something. It amazes me that folks don’t see the writing on the wall.
Remember that this is the justice department that charges him. They are known only to take up cases they are sure they will be able to win.