Background
Gene Matthews III appealed after the San Luis Obispo County Superior Court determined that he met the criteria for commitment as an offender with a mental health disorder under Penal Code section 2962. The qualifying conduct occurred in January 2019, when Matthews stabbed his sleeping roommate 13 times with a butcher knife. The victim survived but required surgery. Matthews later pleaded no contest to assault with a deadly weapon, admitted a section 667, subdivision (a)(1) allegation, and received a nine-year prison sentence. On April 10, 2025, the Board of Prison Terms determined that he met the criteria for treatment through the Department of Mental Health. Matthews petitioned for judicial review, and both sides waived a jury.
At the resulting court trial, the parties stipulated that Matthews had received the minimum required treatment for at least 90 days and admitted numerous legal and medical records. Forensic psychologist Rebecca Aponte diagnosed delusional disorder, persecutory type, and testified that the disorder was at least an aggravating factor in the offense. She relied on Matthews’s heightened paranoia and delusions before and after the stabbing, his statements connecting the victim to those delusions, his violent history, involuntary medication, rule violations, limited insight, substance use, and discharge planning. Defense psychologist Guillermo Franco diagnosed an unspecified schizophrenia-spectrum or other psychotic disorder but found no clear indication that mental illness caused or aggravated the offense. Franco acknowledged having limited offense documentation and lacking jail records showing symptoms around the crime. The trial court found Aponte more credible, relied primarily on Matthews’s own statements about his experiences surrounding the offense, and found the statutory criteria established beyond a reasonable doubt.
The Court’s Holding
The Court of Appeal reviewed the commitment findings for substantial evidence, asking whether a rational trier of fact could find the statutory criteria beyond a reasonable doubt while viewing the record favorably to the People. It explained that appellate review does not permit reweighing evidence or redetermining witness credibility. Applying that standard, the court held that Aponte’s testimony supported the required connection between Matthews’s severe mental health disorder and the qualifying offense. Her account of heightened paranoia, delusions, lack of medication, and statements consistent with delusional thinking allowed a reasonable factfinder to conclude that the disorder was at least an aggravating factor. Matthews’s reliance on Franco’s contrary opinion did not undermine that conclusion because the trial court had resolved the expert conflict by crediting Aponte.
The court likewise rejected the challenge to the finding that Matthews presented a substantial danger of physical harm to others. It described that element as a prediction of future dangerousness by mental health professionals and confirmed that the evaluation may consider the prisoner’s entire history, including prior violence and mental health history. Aponte’s opinions concerning violence associated with mental illness, involuntary medication, prison rule violations, substance abuse, lack of insight, and doubtful future treatment compliance supported the commitment order. The court noted that a single psychiatric opinion that an individual is dangerous because of a mental disorder can constitute substantial evidence.
Matthews also argued for the first time in his reply brief that the trial court improperly admitted and relied on case-specific hearsay through Aponte’s testimony, invoking People v. Sanchez. The appellate court held that he forfeited that claim by failing to object below. It alternatively rejected the contention on the merits because the trial court expressly considered all the evidence, including Matthews’s own statements about his paranoia and experiences surrounding the commitment offense. On that record, the court concluded that any error was harmless under People v. Watson. The judgment, identified as the OMHD commitment order, was affirmed.
Key Takeaways
- A rational factfinder could rely on Aponte’s testimony about paranoia, delusions, and offense-related statements to find that Matthews’s severe mental health disorder aggravated the qualifying crime.
- The existence of a conflicting defense expert opinion did not require reversal because the trial court credited Aponte and appellate review does not redetermine expert credibility.
- Matthews’s violent history, involuntary medication, prison rule violations, substance abuse, and limited insight collectively supported the prediction that he posed a substantial danger of physical harm to others.
- The Sanchez and hearsay challenge was forfeited because Matthews did not object at trial, and the court alternatively found any error harmless in light of the evidence expressly considered by the trial court.
- The Court of Appeal affirmed the OMHD commitment order rather than modifying the commitment or returning the case for another hearing.
Why It Matters
The decision applies deferential substantial-evidence review to a contested OMHD commitment and illustrates how a credited expert’s explanation can satisfy both the offense-nexus and dangerousness criteria despite a contrary professional opinion. It also underscores the practical importance of timely hearsay and Sanchez objections during expert testimony: raising the issue only in a reply brief resulted in forfeiture, while the trial court’s reliance on Matthews’s own statements supplied an independent basis for the court’s harmless-error conclusion.