I know this is a long shot, but have you contacted any media regarding this? Maybe some bad publicity might get the Tribal Authorities to take the right action. At the very least it might help others know to keep their eyes open for these poachers.

Just a thought.
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A veteran - whether active duty, retired, or national guard or reserve - is someone who, at one point, wrote a blank check made payable to "The United States of America," for an amount of "up to and including my life."