Unlikely. Hard to find a plant willing to spend the rest of his life in a federal prison or get shot. There isn't really a 3rd scenerio for this fellow.
It's very easy. Find someone who's going to prison anyway, and promise them a pardon when you get in, or early parole from one of your fellow-travelling Judges if you don't. With the added plus that pardoning an "assassin" would make Hilliary look like Pope JPII.