Shooter taking orders to eliminate the existential threat to democracy.
Reading other posts, I think it would suggest a scenario like this:
Government knows about him and recruits him. Government believes he can hit the target.
He knows where to place himself to shoot.
Secret Service knows he's there and watch him take aim.
If he is successful then Trump is eliminated, but so is the shooter.
If the shooter is not successful he dies anyway.
Crime and coverup.
They are already planning another attempt.