Would you mind a fill that was focused more on the aftermath of a successful brainwashing (Percival helping Grindelwald escape from MACUSA custody and generally being his inside man from there on out) rather than the brainwashing itself? I can touch on the brainwashing process itself (though I imagine it would have to be fairly insidious), but I'm far more interested in what happens once MACUSA finds Graves, thinking he's still loyal when he's anything but.