The Japan Coast Guard sent files to prosecutors Friday on the captain of a Panamanian-registered cargo ship that ran aground two months ago in waters off Ibaraki Prefecture in an incident that killed eight crew members and left two others missing.The 49-year-old captain, Mascarenhas Melroy, is suspected of professional negligence resulting in death and endangering traffic by stranding the 98,587-ton Giant Step on Oct 6, JCG officials said. An Indian national, the captain allegedly failed to deal properly with the ship's broken anchor-hoisting gear and delayed evacuating his vessel as it prepared to set off from near Kashima port amid stormy weather.