Philadelphia’s district attorney Larry Krasner last week made public a headline-grabbing memo aimed at reducing both the number of people in city jail and prisons and the lengths of their stays. In one key change, Krasner’s memo lays out a broad policy, initially announced in February, of non-enforcement for marijuana possession—directing assistant DAs to not charge defendants with a crime regardless of the weight of marijuana carried, or even with any offense related to the purchase of marijuana or possession of marijuana paraphernalia.