 He arrested Henderson, searched McKinney's truck, and found a blood-smeared gun along with Shepard's shoes and credit card.Henderson and McKinney later tried to persuade their girlfriends to provide alibis for them and help them dispose of evidence.Still tied to the fence, Shepard was in a coma eighteen hours after the attack when he was discovered by Aaron Kreifels, a cyclist who initially mistook Shepard for a scarecrow.