So... how about Ted Bundy's necrophilic tendencies. The man was a genious, if only he hadn't fled to Fl where they had the death penalty he'd be a free man right now. He was the model citizen, Ted #5 as he was called the one no one suspected. I have always wondered what his daughter feels like, knowing her father once said "If you add 1 to what Charles Manson had you'll come close to what I have done." (Not exact quotes but close to.)
Disclaimer: The above comments does NOT mean I support Ted Bundy. I believe he is a good example of what a sociopath can do.