In Changes, Rudy points FBI Agent Barry Tilly at Harry Dresden after the latter office building explodes. Harry suspects that Rudolph is someone's puppet. Harry and Molly Carpenter staked out his house—which is nicer than a police detectives should be—to catch his "handler/cleaner", which turned out to be Esmeralda and Esteban Batiste had hired Rudolph and brought an Ik'k'uox to kill him. Later, at FBI Headquarters, Rudy harassed Murphy and Harry, threatening to take Murphy's badge and weapon. Just then, the Eebs attack with a vampire troop and the Ik'k'uox. Rudy freaks out and becomes kind of unresponsive. Agent Tilly is put in charge of him while Dresden and Susan Rodriguez organize the escape from the vampires.