Colorado Indians with Jewish roots?

Sheba Medical Center geneticists have found that a population of Indians in the U.S. state of Colorado has genetic Jewish roots going back to the expulsion of Jews from Spain. The common marker was a unique genetic mutation on the BRCA1 gene. This mutation, commonly known as the "Ashkenazi mutation," is found in Jews of Ashkenazi origin and is associated with an increased risk of developing cancer. The trail began with research conducted by Prof. Jeffrey Weitzel, an oncogenetic expert in California.