First off, consider the case of JWG Jr.
http://www.crimelibrary.com/serial/gacy/gacymain.htm
Basically, this very likeable and perceivably good natured man tortured and raped over 27 young men, many of them dying from their sustained injuries. That link tells the story of one who did get away.
Now, consider the lyrics of Surfjan Stevens, from his new album "Illinoise".
His father was a drinker
And his mother cried in bed
Folding John Wayne's T-shirts
When the swingset hit his head
The neighbors they adored him
For his humor and his conversation
Look underneath the house there
Find the few living things
Rotting fast in their sleep of the dead
Twenty-seven people, even more
They were boys with their cars, summer jobs
Oh my God
Are you one of them?
He dressed up like a clown for them
With his face paint white and red
And on his best behavior
In a dark room on the bed he kissed them all
He'd kill ten thousand people
With a sleight of his hand
Running far, running fast to the dead
He took off all their clothes for them
He put a cloth on their lips
Quiet hands, quiet kiss
On the mouth
And in my best behavior
I am really just like him
Look beneath the floorboards
For the secrets I have hid
Surfjan Stevens is one of the most critically acclaimed artists in the industry. His songwriting capabilities are constantly praised.
The parts italicized really speak to the magnitude of the story, and how unbelievably creepy this song is.
It's pretty incredible how the first half of the song can almost make you feel sorry for this guy who put his victims bodies beneath the floorboards in his home. And then, any feeling of remorse you have vanishes as the song finishes.
I think it's amazing. Thoughts if you've heard?
If you're interested, I'll PM you the mp3.