'As the marathon to legalize marijuana plows forward, a key to winning over many of the leftover prohibitionists might lie within two questions: exactly how significant is the illicit pot trade in the violence south of the border, and what are the long-term implications for Americans as a result of Mexico’s indefinite narco war? Being a former federal agent who has worked on the border and enforced the U.S.’s drug laws, I know that neither of these can be answered with exact precision, but one can hope that illustrating the obvious will at least get us closer to the finish line.'

Read more: How Legal Pot Could Save Thousands of Lives? Hint: Stop Feeding the Mexican Death Cartels