TriStar PicturesTriStar PicturesWhen Keandre Varner found his principal's mug shot online, he posted it to Instagram, along with his opinion that she had been arrested for DUI. In fact, Jamille Miller-Brown, principal of Georgia's Riverdale High School, had been arrested for missing a court appearance on a speeding ticket. Miller-Brown summoned Varner to her office where she tried unsuccessfully to have a police officer arrest him Failing that, she suspended Varner for four days. That was later reduced to two days.