In 2009, the US Supreme Court ordered the state of California to reduce its prison population, setting off some of the biggest changes ever seen in the state’s prison system. In response, the legislature passed AB109 a bill that would transfer thousands of prisoners and billions of dollars to county law enforcement agencies, and provided the biggest opportunity in the state’s history to reform and reshape California’s penal system. Tom Herriman reports on some of the most important developments, and some opinions from key participants in the system.