In February 2004, the United States Court of Appeals for the Ninth Circuit ruled that a direct cultural link between any of the Native American tribes and Kennewick Man could not be proved because of the age of the remains. Its ruling allowed scientific study to continue while the USACE retained custody of the remains. In July 2005, a team of scientists from around the United States convened in Seattle to study the remains in detail. Their research results were published in 2014 in "Kennewick Man: The Scientific Investigation of an Ancient American Skeleton" edited by Douglas Owsley and Richard Jantz. In June 2015, it was made public that scientists at the University of Copenhagen in Denmark determined through DNA from 8,500‑year-old bones that Kennewick Man is, in fact, related to modern Native Americans, including the Confederated Tribes of the Colville Reservation from the region in which his bones were found. The international team of scientists had communicated that finding to the Army Corps of Engineers in 2013.