I have family in Mexico, so I can tell you that the police and army do not represent the general population of Mexico. One good idea that was mentioned is to contact the local TV stations on this side of the border,I bet they would love to do an expose on the border patrol corruption.
Failing that send letters to everyone, here are a few contacts:
-Senator Phil Gramm
370 Russell Senate Office Building
Washington, DC 20510-4302
-Senator Kay Bailey Hutchinson
284 Russell Senate Office Building
Washington, DC 20510 • 202-224-5922
-Governor Rick Perry
Office of the Governor
P.O. Box 12428
Austin, Texas 78711-2428
-Lt. Governor Bill Ratliff
Capitol Station
P.O. Box 12068
Austin, Texas 78711
512 463-0001