The Perfect Couple. . . 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. . . The Perfect Motive. . . Investigators soon suspected that Justin himself was the killer and that the attack was a carefully planned sham. The motive: Justin...