I would bet that a good portion of the fecal contamination came from the rez itself, toilets flushing to "nowhere". I doubt that many people fishing take a crap on the bank enough to do whatever they're saying it did. It's more a "take advantage of the situation/publicity to blame whitey" thing.
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Propping up an obsolete fishing industry at the expense of sound fisheries management is irresponsible. -Sg