Rudolph first appeared as a rookie cop in the S.I. department of the Chicago Police Department. At first he didn't believe in the supernatural and kept asking if the loup-garou is a prank for the rookie. He later transfers to Internal Affairs and makes several appearances throughout the story, most of the time trying to expose Harry Dresden as a fraud or get Karrin Murphy fired.
In the seriesEdit
- Main article: Fool Moon
In Fool Moon,
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- Main article: Changes
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 Harry and Susan Rodriguez organize the escape from the vampires.