(ND) When the power company cut off his electricity Wednesday afternoon, Steven Vaughn hooked up a gas generator in the basement of his family's Mastic Beach home and told his 19-year-old son to turn it off before going to bed, Suffolk County police said Thursday. But when Vaughn and his wife woke up about five hours later, they found Emmanuel Cassaberry unconscious on the kitchen floor and all five other children, and themselves, suffering from varying degrees of carbon monoxide poisoning. Cheryl Cassaberry, Emmanuel's mother, and Vaughn's wife, called 911 and tried reviving her teenage son with CPR at around 8 a.m. Thursday morning. He was transported to Brookhaven Memorial Hospital Medical Center in East Patchogue and pronounced dead.