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Serial killer Harrison Graham is identified as having an IQ below 70.
Philadelphia serial killer murders his girlfriends and leaves their corpses around in his home. Some believe that he is slow-witted, drug-addicted, or insane, others see him as entertaining, religious, and a talented artist with some eccentricities. If you like my videos, please consider joining my Patreon. This is how I manage to pay for my narrations. Thank you! https://www.patreon.com/serialkillers Facebook: https://www.facebook.com/SKDocumentaries Tags: Serial killer documentary,Serial killers,True crime,Crime documentary,Killer documentary,Murder investigation,Criminal psychology,Crime analysis,Forensic analysis