Police spokesman Drew Fowler said Thursday that the 46-year-old man from Renton was booked into King County Jail on investigation of homicide by motorcraft.
He says more charges may be pending as police investigate the Wednesday night collision. Police believe alcohol was involved in the crash.
Seattle fire spokesman Kyle Moore says three of the seven people on the 21-foot sailboat were thrown in the water, including the woman who died.
Hospital spokeswoman Susan Gregg says a man was in serious condition at Harborview Medical Center on Thursday. Another person was treated there and released.
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