Results indicated that as a group, sex offenders were neither particularly persistent nor specialized in their criminal activities. The majority of sex offenders (60 percent) had only one arrest for a sex crime in their criminal histories and only 5 percent of the sample had exclusively sex related arrests. When the different types of sex offenders were examined, child molesters displayed the most specialization but the degree of specialization was still rather weak when compared to other types of offenders, such as property offenders. The findings suggest that contrary to their public perception as serial sexual predators, the arrest patterns of offenders arrested for rape and child molestation do not indicate specialization or persistence in sexual offending. The results have implications for the numerous crime control policies that are premised on the assumption that sex offenders are persistent and specialized offenders. In particular, the authors note that sex offender registry and notification policies are unlikely to decrease sexual victimization. Data on over 38,000 offenders, including approximately 10,000 male sex offenders, who were released from prisons in 15 States in 1994 were originally collected through the U.S. Department of Justice and the Bureau of Justice Statistics and are now available as a dataset from the Interuniversity Consortium for Political and Social Research at the University of Michigan. Data include both State and Federal Bureau of Investigation records of arrests and prosecutions; data were collected for the three most serious charges at each arrest date and were statistically analyzed. Future studies should attempt to replicate the results using self-report and arrest data. Tables, notes, references