Shattered Dreams

David Ditto repeatedly told police that night that Karina's injuries were because of the fall, nothing else. "I heard the cat screech at the top of the stairs and I heard a horrible falling down the stairs," he tells 48 HOURS Correspondent Maureen Maher.. "And I jumped up and ran over, and found Karina laying at the foot of the stairs. She wasn't moving - wasn't talking.".