When Marlene and Steve Aisenberg awoke in their home outside Tampa, Fla., on a November morning in 1997, their five-month-old daughter, Sabrina, was missing from her crib. Immediately, the Aisenbergs reported their child missing and the police began to search for the baby. But soon, the investigation began to focus on themselves as authorities became convinced that the parents knew much more about their baby's disappearance than they were saying.