Suspect at large after mother and 3 children fatally shot in Florida.

A manhunt is underway for Al Stenson, 38, who is suspected of fatally shooting a 40-year-old woman and her three children, ages 21, 17 and 11, in their central Florida home. Stenson is known to the family and may have lived at the apartment. The motive for the shooting is not yet known. Police are working to take him into custody in a safe manner.