Dennis Rader gets terrifyingly candid in the two-part docuseries BTK: Confession of a Serial Killer.
Throughout the bombshell tell-all, Rader's psychologist, Dr. Katherine Ramsland, interacts with the famed murderer via phone call in which he details some of his brutal slayings and the thoughts and motivations behind his desires to "bind", "torture" and "kill" — the horrifying actions behind his nickname.
In one clip via E! News., Ramsland asks him if he enjoys the "look of fear" on his various victims' faces.
"Well, yes," the serial killer replies to her calmly. "It's sort of a sexual arousement. With [Nancy] Fox, things went pretty smooth and everything and although her face was down, it's just the idea that I had done it. It's all I needed.
One of Rader's victims, Fox was only 25-years-old when he became obsessed with her. He broke into her duplex on December 8, 1977, then undressed himself and strangled her to death once she arrived home. The next day, he anonymously informed the police of her murder.
"Dennis Rader challenges the idea we have about serial killers," Ramsland explained in the chilling documentary, noting he had both a regular life and a twisted "fantasy" world. "He was a family man. He was a churchgoer, even a president of his church congregation. He had a full-time job. He was part of his community. So we have to be careful about some of the stereotypes we form about these kinds of offenders."
She also elaborates on Rader's upbringing in the clips, admitting there was no particular reason or trauma from his past that could have sparked these actions.
"He was an all-American boy," she continued. "The oldest of four boys in his family. He had an intact family and played on his farm. So where did it all come from?'
Kansas City Bureau of Investigation special agent Ray Lundin also spoke about the case, saying there was "great value" in understanding men like Rader and "the things that made him do what he did."
"If we have more people who are skilled at recognizing those aspects of a person that might lead them in a path of some criminal behavior whether it be a serial killer or whatever, if they can intervene, think of the lives they'll save," Lundin concluded.
BTK: Confession of a Serial Killer premiered January 8. The second half of the shocking documentary will air January 9 at 9 P.M. on A&E.