A man who died in a boat sinking near Alcatraz Island in the San Francisco Bay on Tuesday has been identified as 79-year-old Clifford Joseph Boisa of Sutter County. Boisa is reported to have been a reserve deputy sheriff. According to accounts from multiple outlets, the incident involves a pleasure boat carrying 20 passengers, traveling as an extended-family group to a memorial service. The boat capsizes and goes down in the cold waters near the former prison. Authorities confirm that the search is ongoing for three passengers who remain missing. The remaining passengers have been reported as accounted for. The reports characterize the incident as occurring near Alcatraz and emphasize the continued efforts to locate those still missing. No details about the cause of the sinking are provided in the available summaries.