This story has been updated to clarify the dates Cook County first began using all stages of its pretrial assessment tool and the dates used to compare release rates against the court's new bond policy.A nonprofit that advocates for the abolition of cash bail practices gave Illinois a C in its first report examining pretrial services nationwide.The Pretrial Justice Institute, located outside of Washington, D.C., graded Illinois’ suite of pretrial services and detention practices much higher than the U.S. as a …