Peter Mullen, formerly known as Leroy Jenkins, is a shy looking boy who first appeared in "Mystery of the Urinal Deuce". In this episode, Peter did a "Show and Tell" about his pet frog. He made a reappearance in "The List", ranking #6 on the girls' fake list, as Leroy Jenkins. In the episode "1% ", he was seen in the gym class crowd. He was also seen in the episode, "Cash For Gold", where he was seen on the playground selling jewelry to Eric Cartman. He was recently seen in the episode, "Informative Murder Porn", giving a school report on "murder porn".