Indiana scored poorly in all categories, including its pretrial detention rate.
The bill says those who aren't a flight risk or who don't pose a danger to the community should be released without bail.
Seventy percent of those in jail are simply awaiting trail. The court says current bail practices unfairly target the poor.
The ruling overturns 147-year-old precedent of making defendants in murder cases win the right to post bond.
A state court in Indianapolis granted the Chinese immigrant $50,000 bond. She is being charged with feticide after trying to commit suicide while pregnant.