The FBI spent 18 years trying to find Jaycee Dugard, a girl abducted in 1991, when she was 11, while walking to her bus stop in South Lake Tahoe, Calif. But when the case broke last week, it wasn't a sweeping raid or a well-placed tip that eventually led the FBI to Dugard and the arrest of her alleged captor, Philip Garrido. It was intuition.