Serial killers walk among us.

Some are outcasts of society that look "the type" while others blend into society so perfectly that their own families are none the wiser. All of them are the stuff of nightmares. Their unfathomable acts leave a scar on history and many of them continue their rampage without ever being identified by police.

Thankfully, every so often, these monsters are apprehended and put away for good. What's perhaps more shocking is that these animals, especially those that are so meticulous in their crimes, are caught through their own simple mistakes.

From leaving behind evidence, traffic infractions, and burying bodies in the backyard, the worst of the worst had their reigns curtailed for embarrassing reasons.