"Twenty-nine states, the District of Columbia, Puerto Rico, and Guam have legalized medical marijuana, and eight states plus D.C. have sanctioned recreational use. But fewer states have made it possible to clear past marijuana offenses. In the last three years, at least nine states have passed laws addressing expungement of certain marijuana convictions, according to the National Conference of State Legislatures. But no state goes as far as California. [Read more...]"