Hunting a Psychopath

The rapist attacked his fourth victim over two and a half hours. The level of violence was unlike any he had inflicted previously. He left the back door open with the chair resting against it so it couldn't close. After the attack, he dragged her out onto the back patio and tied her to a post. Her wrists were turning black from lack of blood flow. She thought she heard him talking in a low voice at one point,. possibly on the phone, but no call was recorded from the house. Police found two empty coars, beer cans in the kitchen. Almost everything was in keeping with his ammo. It appeared to be the first time he had not stalked the victim in days