|First Appearance||Cartman's Mom is Still a Dirty Slut|
Ever since his son Adam was abducted and murdered, John Walsh made it his mission to do whatever he can to prevent these tragedies from happening again. He hosted America's Most Wanted and was set to do a live episode from South Park covering the shooting of Dr. Alphonse Mephesto when a blizzard cut the feed. He hasn't been seen since.
- Cartman's Mom is Still a Dirty Slut (s02e02)