>> reporter: shawn hornbeck lost his childhood. >> held captive for 4 1/2 years. >> reporter: when devlin abducted another boy it was a critical break when police found both boys. hornbeck has launched a missing children foundation. >> see something, say something. >> this is jaycee dugard. >> reporter: kidnapped at age 11, held for 18 years. by philip garrido and his wife nancy in northern california. garrido fathered two children with his victim. dugard lived as a prisoner in plain sight until a local police officer's suspicions tracked her to a secret backyard compound. >> if you see something that looks wrong or amiss, speak out. it might be wrong. but you might save someone's life. >> reporter: dugard's mother told piers morgan joy and heartache follow a kidnapped child's return.