The U.N. Committee on the Elimination of Racial Discrimination (CERD), just issued an Early Warning and Urgent Action regarding the discriminatory impact of the construction of the border wall on indigenous peoples leaving in Texas. The petition was prepared by students at the Human Rights Clinic in collaboration with Dr. Margo Tamez (citizen of the Lipan Apache Band of Texas; Faculty of Indigenous Studies at the University of British Columbia Okanagan), in coordination with the Lipan Apache Women Defense, an Indigenous Peoples’ Organization (IPO), and members of the Lipan Apache Band.
Here is the letter from the UN CERD to the United States: http://www2.ohchr.org/english/bodies/cerd/docs/early_warning/USA1March2013.pdf
It is accessible at the bottom of this page, under the United States, 2013 ‘E’. > http://www2.ohchr.org/english/bodies/cerd/early-warning.htm