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California Registered Sex Offenders: This spreadsheet will provide you with updated and comparative numbers for registered sex offenders in each of the CA 58 counties . If you scroll down to the end of the page you will see tabs for both July and November 2007 .Please keep in mind that these statistics present the total number of registrant's that are "IN the Community" and exclude registrant's that are incarcerated (INC), deported (DEP), and Out of State (OUT) We will continue to provide updated information about the number of sex offenders who register as transient (Homeless). We have that number at the bottom of the spreadsheet, or in a separate column.

This article describes how sex offender registration and notification affect the frequency and incidence of offenses and checks for change in police response to reported crimes. The evidence suggests that registration reduces the frequency of sex offenses among "local" victims" (e.g., friends, acquaintances, neighbors) but not against strangers. It also presents evidence that community notification deters first-time sex offenses but increases recidivism by registered offenders by imposing social and financial costs, making non-criminal activity relatively less attractive after an initial conviction. This is consistent with previous work by criminologists and important because the stated purpose of community notification is to reduce recidivism.

University of Michigan Law and Economics workshop discussing information about the effect of law to assist in protecting the public and how the laws have evolved into punitive measures.

This study used a randomly selected a sample of 200 of 23,456 registered offenders to determine whether the SOR data was complete and accurate. More than 1/3 contained certain inaccuracies or omissions. Driver’s license numbers were frequently inaccurate, and belonged to a person other than the offender in Division’s records.

This report surveyed registered offenders in Connecticut and Indiana and found that the negative consequences of community notification occurring with greatest frequency were job loss, threats and harassment, property damage, and suffering of household members. The majority experienced psychosocial distress. The article makes recommendations for community notification from empirically derived risk assessment classification systems

The paper examines the history of Megan's Laws, claims made by legislators without accounting for the variations in recidivism rates among studies, and shows how the studies to support legislation do not represent the majority of convicted sex crimes. The paper also analyzes the harm created by Megan's laws when applied to low risk offenders.

This December 2008 federally-funded study by the Dept. of Justice investigated the overall effect of Megan’s Law on sexual offending over time, specific deterrence, and costs of the law. It comparatively analyzed sex offender statistics in New Jersey counties one decade before and one after Megan’s Law, data on 550 sex offenders released between 1990 and 2000, and implementation and ongoing administrative costs of the law. Highlights of the findings were that Megan’s Law has not shown a significant reduction of recidivism rates, first offenses, or in reduction of victims of sexual offenses; hence, the escalating cost may not be justified.

In 2003, the United States Supreme Court issued its only two opinions regarding the constitutionality of sex offender registration and notification statutes. Smith v. Doe ("Smith") and Connecticut Department of Public Safety v. Doe ("DPS"), upheld the Alaska and Connecticut registry and notification laws against Ex Post Facto Clause and procedural due process challenges. Three years later, the Federal Sex Offender Registration and Notification Act ("SORNA") was passed as part of the Adam Walsh Child Protection and Safety Act. The federal statute was very different from the state statutes that the Court reviewed. Most notable among the differences was the creation of the federal crime of "failure to register" which was punishable by up to ten years imprisonment. This article contends that most district courts have been severely misguided in reading the two Court opinions and the statutory provisions of SORNA. Consequently, this article concludes that either Congress should amend SORNA or courts should strike down portions of SORNA on Ex Post Facto Clause, procedural due process, and Commerce Clause grounds.

The California Sex Offender Management Board offers the position that CA should elect to NOT comply with the Adam Walsh Act. In coming to this position, the CASOMB looked at the following issues: Risk Assessment, Expansion of Juvenile Registration, the addition of new registrable offense, and lack of funding

This article reviews the history of recent sexual offender policies, suggesting that misinformation has lead to poorly developed social policy. These policies are not evidence-based in their development, their implementation or their effectiveness. The authors make recommendations for more effective legislative solutions for addressing sexual violence.

This article examines housing market and sex offender registration data in North Carolina to estimate the effects of registrant proximity on housing values. The authors find that houses within 1/10 of a mile of known registrants sell for about 4% less than comparable homes not in close proximity to a registrant. Similarly, the authors find that property values fall significantly when sex offenders actually victimize neighbors.

In 2004, the Washington State Institute for Public Policy evaluated effectiveness of sex offender sentencing. It found nearly that 20% of those required to register, failed to do so, and this percentage is steadily rising since the requirement’s inception in 1990. This study found that those sex offenders who are convicted of failure to register have a 50% higher recidivism rate than those who register.

The court held that the application of the three-strikes law resulted in a constitutionally excessive penalty.