On July 16, 2026, the California Court of Appeal, Fourth Appellate District, Division One, issued a published opinion in Sua v. Superior Court (D087742) that strengthens protections for defendants seeking pretrial mental health diversion. The decision clarifies important limits on prosecution discovery powers and reinforces the informal, treatment-focused nature of diversion proceedings under Penal Code section 1001.36.

A Summary of Sua v. Superior Court

Miguel Sua and Alexander Guthrie faced separate felony charges in San Diego County. Each requested pretrial mental health diversion, supported by recent diagnoses of qualifying mental disorders and expert opinions that those disorders contributed to the charged offenses. Neither defendant indicated an intent to raise a mental-state defense at trial.

The People moved under Penal Code section 1054.3(b)(1) to compel the defendants to submit to mental examinations by prosecution experts, arguing that the diversion requests placed their mental states “in issue.” The superior court granted the motions. Sua and Guthrie petitioned for writs of mandate.

The Court of Appeal consolidated the petitions and granted them. It held that section 1054.3(b)(1) does not authorize compelled mental examinations in the context of a pretrial diversion request under section 1001.36. The statute’s plain language and legislative history limit such orders to situations in which a defendant places their mental state in issue at trial through proposed expert testimony on mens rea (purpose, intent, knowledge, or malice). Diversion hearings are informal, pretrial alternatives to prosecution; not trials or adversarial adjudications of guilt or mental state.

The court emphasized that diversion hearings “shall be informal and may proceed on offers of proof, reliable hearsay, and argument of counsel.” They are “not a trial.” Prosecutors may still present relevant evidence to challenge eligibility or suitability, including their own expert reports or requests for court-appointed experts under Evidence Code section 730, but they cannot force a defendant into a compelled examination solely because the defendant seeks diversion.

Key Takeaways for Individuals and Families

This ruling matters for anyone navigating the intersection of mental health and the criminal justice system. Some key takeaways include:

• Seeking diversion does not automatically open the door to invasive, compelled psychiatric examinations by the prosecution. The process remains focused on treatment eligibility and suitability rather than a full adversarial battle over diagnosis at the diversion stage.
• Defendants and their families can more confidently gather and present supporting documentation, such as diagnoses, treatment records, and expert opinions, without the immediate risk of being ordered into a prosecution examination that could feel coercive or chilling.
• The informal nature of diversion is preserved. Courts may rely on a range of credible evidence (police reports, medical records, treatment-provider statements, and expert opinions) without converting the hearing into a mini-trial.
• Public safety remains a core consideration. Courts still evaluate whether a defendant poses an unreasonable risk if treated in the community, and prosecutors retain tools to contest that issue with proper evidence.

For families watching a loved one face charges while struggling with mental illness, the decision reduces one potential barrier to accessing treatment-focused alternatives.

Why This Decision Matters for Mental Health Law and How We Help

California’s mental health diversion statute exists to interrupt the cycle of untreated mental illness and criminal justice involvement. It recognizes that many people who come into contact with the system need clinical intervention more than (or in addition to) punishment. Sua protects that statutory purpose by preventing an overbroad reading of discovery rules that could deter eligible defendants from even seeking diversion.

At Lessem, Newstat & Tooson, LLP, we have long advocated for clients whose mental health conditions intersect with criminal charges, LPS proceedings, competency issues, and related matters. We understand that the path to diversion or other treatment-oriented outcomes often requires careful preparation of clinical evidence, strategic advocacy at hearings, and vigilance against procedural overreach.

This decision aligns with the approach we take every day: protecting clients’ rights while pursuing the most constructive, clinically sound resolution possible.

Ongoing Considerations After Sua

Sua continues a line of recent appellate guidance that keeps diversion grounded in clinical reality and statutory design rather than expanding it into a full-blown adversarial contest at the eligibility stage. As California continues to refine mental health diversion, through both case law and legislation, courts and counsel will need to remain attentive to the balance between access to treatment and legitimate public-safety concerns. Defendants, families, and practitioners should expect ongoing scrutiny of how evidence is presented and how courts exercise residual discretion on suitability and risk.

The decision also underscores the value of early, well-supported clinical evaluation. Strong, independent expert opinions remain central to successful diversion requests, and this ruling helps ensure those opinions are not automatically met with compelled counter-examinations simply because diversion is requested.

If You or a Loved One Is Facing Similar Challenges, Speak With Our Team

Mental health issues and criminal charges create intense stress for individuals and families. Whether you are exploring mental health diversion, facing questions about eligibility or suitability, or navigating related proceedings, timely legal guidance can make a meaningful difference.

If you or someone you care about is dealing with criminal charges involving a mental health component, contact Lessem, Newstat & Tooson, LLP. We are prepared to review the facts, explain your options under current law, including the protections clarified in Sua, and advocate for outcomes that prioritize both accountability and appropriate treatment. Early consultation allows us to help gather the clinical support and present the strongest possible case for diversion or other constructive resolutions.

Your situation is unique. Let us help you understand the path forward.