The Cookie Monster didn't do it! The real monster is Harrison Graham, a serial killer from Philadelphia. When detectives broke into his apartment in 1987, they could already smell the filth of his hoarding, but they could smell, too, the rotting corpses that were hidden within. Listen in to learn about this man and his weird fascination with his stuffed animal. #CookieMonster #SerialKiller #HarrisonGraham #Philadelphia

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