The accident happened just before 7 00 p. M. In the dangerous area known azraq coop strait between tiburon and angel island. The boat,rer appears to have hit a ware unclear, but both suffered severe cuts from the propellers. There is a fair possibility that they were immediately swept under the boat when they went off the bow, or they were hit when he turned the boat to rescue them. After the accident, Javier Burillo pulled his sonsconthi ye forhelp. The 11yearold had already died. When police tested burillo for the presence of alcohol, they say he exceeded the legal limit. They arrested him in his home and took him to county jail. This afternoon, detectives served a search warrant on the property, reasons unknown. Tiburon police say d dve fatality. O him to do that. He had that choice. And the negligent part of it is the alcohol. Was he going too fast . I dont know. Tiburon police tell us this is the first manslaughter case in that city in the last ten years. Live outside marin county