It is implied that in 1920 he was working for Hauptzelt Zircus. One of his victims was Jacob who strangely appears in an old photograph with him although their relationship and the identity of Jacob is open to interpretation. He also had in his possession a copy of A Child's Garden Verses dedicated to Jacob. It is implied that Hooded Justice was one of his victims, if not Jacob himself. Müller quit his job at the height of the Senate Subcommittee hearings. Hollis Mason considered possible that Müller and Hooded Justice were one in the same, since they had consistent builds.