According to CNN, Rader admitted to setting up his tripod and camera in hotel rooms and taking photographs of himself, and he would often experiment with 'auto-erotic activity,' which involved Rader limiting his own oxygen supply to experience 'a heightened feeling of euphoria' during sexual release.' Some were of the people he murdered, and others were of himself in various forms of bondage. While searching his property, authorities found a treasure trove of 'trophies' from Rader's 10 victims, copies of the letters he sent police and hundreds of photographs. It wasn't until 2005 when police finally captured Rader that they discovered how deadly his fantasies became. By 18, Rader said his fantasies escalated into window-peeping and stealing women's underwear. In one of the BTK Killer's several letters to police, serial killer Dennis Rader shared disturbing details from his childhood that explained the motivations behind his brutal, sexually charged murders. Rader explained that as a boy, he would often view pornography, which he believed led him to develop violent fantasies as a teenager that involved 'S/M & B/D' ( sadomasochism and bondage and domination). Warning: This article has graphic content that may be disturbing to some viewers.
