In 1980s Philadelphia, a mentally disturbed man who carried a Cookie Monster puppet was known as a gentle neighbor and local drug user. Harrison Frank Graham was never considered a threat. But when neighbors complained of a foul odor from his apartment, police made a grisly discovery. Inside his squalid, trash-strewn home, they found the decomposing bodies of seven women hidden under mattresses and in closets [citation:7]. Some remains were skeletonized and stuffed in duffel bags on the roof, while others were found in the basement [citation:2]. Graham had been using drugs to lure women to his apartment, then strangling them during sex [citation:4]. He fled briefly, but his mother persuaded him to confess. At trial, he was convicted of seven murders and sentenced to death, later commuted to life. He spent his life in prison, but one of his strangest requests during the trial was a simple one—he asked for his Cookie Monster puppet back. This is the story of the unassuming man whose dark compulsion made him one of Philadelphia's most notorious serial killers.