Yeah, he was the child rapist.
https://www.wisconsinrightnow.com/2021/03/11/joseph-rosenbaum-sex-offender/?amp=1
Joseph Rosenbaum sex offender documents obtained by Wisconsin Right Now from the Pima County (Arizona) Clerk of Courts confirm Joseph Rosenbaum was charged by a grand jury with 11 counts of child molestation and inappropriate sexual activity around children, including anal rape. The victims were five boys ranging in age from nine to 11 years old.