The study used criminal-history data and prisoner records to analyze the post-release offending patterns of persons who served prison sentences for rape or sexual assault. Recidivism was determined for any offense, not just sex offenses. Overall, 67 percent of sex offenders released in 2005 were arrested at least once for any type of crime during the 9-year follow-up period; 8 percent were arrested for rape or sexual assault during this period. Rape and sexual assault offenders were less likely than other released prisoners to be rearrested during this period; however, they were more likely than other released prisoners to be rearrested for rape or sexual assault. Half of released sex offenders had a subsequent arrest that resulted in a conviction. Less than half of released sex offenders were arrested for any crime within the first 3 years after their release, and just over two-thirds were rearrested within 9 years. Among released prisoners who had a prior arrest for a sex offense, but were serving time for other than a sex offense, 6.7 percent were arrested for rape or sexual assault over the 9-year period.