In 2014 California voters strongly passed Proposition 47. Its goal is to reduce the huge number of people incarcerated in California for relatively small crimes, a number that had been growing far faster than population growth.
Prop. 47 authorizes the release of persons convicted and jailed for two types of crime: petty property crimes where the value of the goods was below $950 (typically theft, forgery, etc.), and personal use of illegal drugs. Violent crimes are excluded.