Billy Capshaw suspects the infamous serial killer was behind unsolved murders and disappearances that happened long BEFORE his murder spree in the States‘DEVIL’S BEST FRIEND’ Jeffrey Dahmer used me as his ‘guinea pig’ for rapes and killing spree – I’m haunted by the night I vowed to murder himCHATTING about music to his new roommate Jeffrey Dahmer, 17 year-old Billy Capshaw felt sure the pair would get along. Jeffrey Dahmer was the devil’s best friend. Eventually, the beating stopped and Billy was able to go back to his room where he found Dahmer asleep. He’s trying to take my clothes off and then he raped me and I couldn’t stop it.”Traumatised by the ordeal, Billy jumped out of their third-floor window to escape. Cannibal's warped collection of body parts TWISTED cannibal murderer Jeffrey Dahmer kept a stomach-churning collection of body parts in his 'house of horrors', including a severed head in his freezer and a huge drum full of male torsos.