WASHINGTON (CNN) -- Remains of a U.S. Navy sailor who was listed as missing in action after Japan's 1941 attack on Pearl Harbor have been identified and will be returned to his family, the Department of Defense said. Seaman 2nd Class Warren P. Hickok of Kalamazoo, Michigan, was assigned to the USS Sicard when Japanese aircraft attacked the U.S. Navy base at Pearl Harbor, Hawaii, on December 7, 1941, the Defense Department's POW/Missing Personnel Office said Friday. Hickok was among crew members who were sent to assist the crew of the USS Cummings, a destroyer docked nearby.