California Penal Code 1320.35 sets strict rules for validating the risk assessment tools used to decide whether a defendant is released or held before trial. The statute aims to reduce bias, increase transparency, and ensure that pretrial detention decisions are based on scientifically sound methods. For defense attorneys, these requirements create strong opportunities to challenge unlawful or biased pretrial detention determinations.

Legislative Intent Behind Penal Code 1320.35

The law reflects the Legislature's acknowledgment that pretrial decision-making can be influenced by biases related to gender, income level, race, or ethnicity. The statute's core purpose is to ensure that any pretrial risk assessment tool is scientifically validated and regularly reviewed to prevent these biases from affecting release decisions.

Scientific Validation Standards

Any pretrial risk assessment tool in California must be validated using accepted scientific methods. The validation process must:

• Measure accuracy in predicting whether defendants will appear in court.
• Evaluate reliability in assessing public safety risks.
• Use the most recent local data available.
• Be revalidated at least once every three years.

If a tool fails to meet these standards, defense counsel can challenge its use in their client's case.

Transparency and Public Access

Pretrial services agencies are required to make available the complete details of their risk assessment tools, including line items, scoring systems, weighting, and validation studies. This transparency gives defense attorneys the ability to review and question the fairness of the assessment process.

Transparency also aligns with California's broader pretrial rights framework, including procedural safeguards such as those outlined in bail and pretrial detention law, ensuring defendants understand and can contest the basis for detention decisions.

Bias Identification and Mitigation

PC 1320.35 requires that any implicit bias in assessment tools be identified and mitigated. This includes demographic impact analyses to ensure that factors like race, gender, or economic status do not unfairly influence risk scores. When bias is detected, the tool must be modified or replaced.

Defense Opportunities Under Penal Code 1320.35

Attorneys defending clients in pretrial hearings can leverage PC 1320.35 to challenge:

• Expired validations that exceed the three-year limit.
• Validation studies that use irrelevant or outdated data.
• Failure to test for racial, gender, or socioeconomic bias.
• Risk factors not supported by scientific evidence.

Common Validation Deficiencies

• Data Issues: Using national data instead of local or relevant jurisdiction data.
• Bias Oversight: Failing to evaluate demographic disparities.
• Unproven Factors: Including criteria like employment status without evidence of predictive value.

Strategic Defense Applications

Defense counsel can strengthen challenges to pretrial detention by:

• Obtaining and reviewing all validation studies and scoring methodologies.
• Hiring expert witnesses, such as statisticians or criminologists, to critique flawed tools.
• Using Judicial Council compliance lists to identify non-compliant jurisdictions.
• Collaborating with other attorneys to address widespread systemic issues.

Judicial Council Oversight

The Judicial Council is responsible for keeping a list of pretrial services agencies that comply with both the validation and transparency requirements. Defense attorneys should consult this list to determine whether their jurisdiction's assessment tool meets the legal standards.

In cases where judicial discretion is central to the outcome, familiarity with related procedural laws, such as California witness laws, can also strengthen defense arguments.

Long-Term Implications for Pretrial Practice

PC 1320.35 will continue to shape pretrial practice as standards evolve and new validation methods emerge. Attorneys should monitor annual Judicial Council reports, new research on bias mitigation, and developments in assessment tool design to maintain an effective defense strategy.

In high-stakes criminal matters, including those with potential capital consequences, the ability to challenge risk assessment tools may intersect with broader defense strategies, such as those used in capital case defense and LA County Superior Court Rule 8.40 matters.

Penalties for Non-Compliance With Penal Code 1320.35

PC 1320.35 itself does not impose criminal penalties on defendants but creates procedural safeguards. If an assessment tool does not comply with the statute, its results may be excluded or given less weight in court. This can significantly improve the likelihood of securing pretrial release for the accused.

California Penal Code 1320.35 Defense Lawyers in California

If you or a loved one are facing pretrial detention based on a questionable risk assessment tool, the attorneys at Bulldog Law can help. Our team understands how to challenge non-compliant assessments under Penal Code 1320.35 and how to present compelling arguments for release. With deep experience in pretrial rights, bias mitigation strategies, and challenging flawed methodologies, we are committed to protecting your freedom and ensuring fairness in the pretrial process. Contact Bulldog Law today to discuss your case.