Today, in a 5-4 ruling, the U.S. Supreme Court upheld a decision ordering California to reduce its state prison population by more than 30,000 prisoners. It found that as a result of overcrowding, the prisoners’ “medical and mental health care … has fallen short of minimum constitutional requirements ... .” Even after the prison population is reduced, California’s prisons could still be over 37% above capacity.   The dissent painted a picture of a public safety disaster if the inmates were released.…