California's pot industry poses dangers

I found the article on the poisoning death of a scientist's dog one of the most frightening things I have read in ages. ("Was poisoning of scientist's dog a warning from Humboldt pot growers?," May 10) For decades, local, state and federal officials have seemed to turn a blind eye to the thriving and ever-more-powerful illegal marijuana cultivation business in Northern California. It was only a matter of time before Mexican or other international cartels became involved. Huge swaths of back-country are implicitly off-limits to the public, where one risks a violent confrontation with growers. The intimidation and violence outlined in the article are just one example of...