What is the dentition on the remains found? Is this known? There are certain characteristics ofr American Indian dentition.
Anthropologists for more than a century have been intrigued by the
biological similarities between Siberians and North American Indians. Christy Turner II of Arizona State University has studied the changing physical characteristics of Native American teeth, especially in their crowns and roots, and has compared them with those of Old World Asian populations.
The dental features studied by Turner are more stable than most morphological traits. There is a high genetic component that minimizes the effect of environmental differences, sexual dimorphism, and age variations. Turner has studied more than 4000 individuals, ancient and modern. From this, he has developed a series of hypotheses about the first settlement of the Americas based on dental morphology.
Prehistoric Americans display many fewer variations in their dental morphology than do Eastern Asians. Turner calls these features sinodonty.
It is a pattern of dental features that includes shovel-shaped incisors, single-rooted upper first premolars, triple rooted lower first molars and other attributes.
(My note: what kind of frequencies are observed? Three-rooted lower first molars are reported in 25-40% of Eskimo-Aleuts and 6% for most North American Indian groups.)
The cornerstone of Turner's hypothesis is this: sinodonty only occurs in northern Asia and the Americas. Sinodonty does not occur among the neighboring Mal'ta people of Lake Baikal or in the Stone Age Ukraine.
http://www.uic.edu/classes/osci/osci590/10_1Non-Metric.htm