Josh Powell went off the grid for 18 hours after avoiding arrest on Dec. 8, 2009. He popped up the next afternoon in Tremonton, Utah. Police soon learned he'd put 807 miles on a rental car. The news media learned of Susan Powell's disappearance and began to hound Josh, even as his own neighbors turned against him. In the middle of all of this, Josh went to a physical therapist and was diagnosed with a rotator cuff injury -- something unknown even to police until now.