DER SPIEGEL has a good overview of some of the results published recently regarding the DNA analysis of a body found in Montana on private land. Its location means it is one of the only sets of remains which have been permitted to be tested:
The characteristic fluting of the stone weapons serve as archaeological evidence that the boy, who died some 12,600 years ago, came from the Clovis culture. It was one of the earliest New World groups, disappearing mysteriously a few centuries after the child’s burial in present day Montana. …Now a team of scientists led by the Danish geneticist Eske Willerslev has analyzed the boy’s origins and discovered that he descends from a Siberian tribe with roots tracing back to Europe. Some of the boy’s ancestors are likely even to have lived in present-day Germany. Their findings go even further: More than 80 percent of all native peoples in the Americas — from the Alaska’s Aleuts to the Maya of Yucatan to the Aymaras along the Andes — are descended from Montana boy’s lineage.
The article also touches on some of the concerns in the native community around DNA testing – there is no appetite for being linked to Europe populations, and very real concerns that DNA testing could be used in tribal disputes over who shares in the economic bounty from casinos that operate on the sovereign reservations.