On a hot summer night, near St. Augustine, Florida, a beautiful couple--who had everything going for them--went for a walk on the beach. By midnight, April Barber was dead, her husband Justin was riddled with bullets, and police had a baffling mystery on their hands. Investigators soon suspected that Justin himself was the killer and that the attack was a carefully planned sham. The motive: Justin had carried out multiple affairs and was strapped for the kind of cash April's life insurance would pay. But the cops had a problem. They had no murder weapon, no witnesses, no DNA--no hard evidence at all.