They wear a facade, like the false building fronts of a Hollywood set, never allowing anyone to see the true ugliness inside. BTK was a church deacon; John Wayne Gacy entertained children as a clown, and Ted Bundy worked at a suicide hotline. The danger remains hidden in plain sight; they are the frayed wiring behind the walls, the worn O-ring on the space shuttle, the total stranger in your family. They walk amongst us daily, and we never suspect.
- excerpt from "The Killer's Handbook"