He might have murdered two people, but it always seems like Rodger Stanford sets the record for the most people he plots against altogether - along with the two murder victims, he tricks his Aunt Doris, he uses Betty to frame David, he frames Quincy as a blackmailer (both of those AFTER they're murdered) and he frames Everett. He even tricks the police into thinking his trying to hide those photos makes him the good guy! And before the beginning of the story, there's the way he evidently invents some of that "corporate bad feeling."