After the BTK killer Dennis Rader was arrested on February 25, 2005, police uncovered his stashes of writings, photos, artwork and other assorted items he had kept over the years related to his crimes. He had a bondage fetish and enjoyed wearing the undergarments of his slain female victims. He enjoyed tying himself up in all sorts of ways. Using various mechanisms he was able to photograph himself with a Polaroid camera. During his years as a Boy Scout troop leader, he nearly got caught once when he couldn’t escape his own bonds after tying himself up inside a camper during a scout outing. He eventually worked himself loose.
This person is from my hometown. There are tons of killers like him in Kansas that have similar fetishes that lurk Craigslist.