The son of a pilot killed in the Vietnam War says his family is reluctant to provide blood samples to help the Defense Department settle questions over remains in the Tomb of the Unknowns.

Dave Amesbury said the family's fears were fed by contradictory information from military sources, cases of misidentification and criticism of the U.S. Central Identification Laboratory in Hawaii."We can live with the uncertainty. We have for 26 years, but we wouldn't know what to do with an identification that we'd always suspect is inaccurate," said Amesbury, an assistant state attorney general.