Source : Coast Guard initial report : Human being probably involved . It was crew 's first voyage on Cosco Busan , which hit Bay Area in dense fog . The oil sickened birds and formed globules on more than 20 of the area 's beaches . Bird not allowed to leave boat due to federal law , says Coast Guard . Feds launch criminal investigation ; 58,000 gallons leaked and killed nearly 400 birds .
Source : Coast Guard initial report : Human being probably involved . It was crew 's first voyage on Cosco Busan , which hit Bay Area in dense fog . Bird not allowed to leave boat due to federal law , says Coast Guard . Feds launch criminal investigation ; 58,000 gallons leaked and killed nearly 400 birds .