The Cook County Day Reporting Center (CCDRC) was opened to supplement other pretrial release programs. The primary and immediate goals were to increase court-appearance rates, reduce pretrial criminal activity among program participants, and initiate participant rehabilitation. The CCDRC accomplished those short-term goals. The report considered long-term impact of the program through analysis of rearrest and reincarceration rates of participants following discharge from the program. Among participants who were in the program for fewer than 10 days, more than 70 percent were arrested for a new crime within 1 year of release. The rearrest rate for participants who were in the program more than 70 days was 55 percent. The average number of days to rearrest for those in the program fewer than 10 days was 303; the average for those in the program 70 days or more was 425. Even after statistically controlling for other factors, including age, criminal history, and time at risk, longer lengths of program participation consistently reduced the likelihood of rearrest. Figures, notes, tables, references, appendixes