Judge William J. Pendergast

Judge William J. Pendergast serves on the Solano County Superior Court, having been appointed by Governor Jerry Brown in December 2016 and formally invested in February 2017. His documented case history reflects a judicial profile centered on serious criminal matters, including homicide trials, sexual violence prosecutions, and post-conviction review proceedings. The cases attributed to him span the full spectrum of criminal adjudication, from initial trial through sentencing and collateral review. The most distinctive documented characteristic of Judge Pendergast's jurisprudence is his demonstrated willingness to grant post-conviction relief when forensic science underlying a conviction has been discredited. In 2025, he exonerated Reginald Tanubagijo after 11 years of wrongful incarceration, citing discredited science as the basis for vacating the conviction. This ruling signals that Judge Pendergast evaluates the scientific validity of forensic evidence with rigor and is not bound by deference to prior verdicts when the evidentiary foundation has eroded. At the same time, his 2021 sentencing of a Fairfield sexual predator to over 300 years in prison demonstrates that he issues severe sentences in serious violent and sexual offense cases where the facts warrant it. These two data points together define a judge who is analytically rigorous on evidentiary questions and unsparing in punishment when guilt is established.

Attorneys handling criminal matters before Judge Pendergast should treat the scientific validity of forensic evidence as a threshold issue. The Tanubagijo exoneration demonstrates that Judge Pendergast will scrutinize the current scientific consensus underlying forensic methodologies, not merely whether the evidence was admitted at the time of trial. Defense attorneys challenging convictions or seeking to exclude forensic evidence should present peer-reviewed literature, expert testimony, and any relevant changes in professional standards to document that a methodology has been discredited or fallen out of scientific acceptance. Prosecutors relying on forensic evidence should be prepared to affirmatively defend the current scientific standing of their experts' methodologies. In sentencing proceedings, the documented 300-plus year sentence in a sexual predator case signals that Judge Pendergast does not shy away from imposing the maximum available punishment in serious violent and sexual offense cases. Defense counsel in such matters should prepare comprehensive mitigation packages and be prepared to address aggravating factors directly, as the record suggests Judge Pendergast engages substantively with the severity of the offense. Prosecutors should present thorough victim impact evidence and statutory aggravating factors in organized, well-documented form.

• critical

  Audit Forensic Evidence for Current Scientific Standing

  Before any hearing involving forensic evidence, research whether the methodology at issue has been criticized, limited, or discredited in peer-reviewed literature or by professional scientific bodies since the time of the original proceeding. Judge Pendergast has acted on such challenges.

• critical

  Prepare Comprehensive Sentencing Record in Violent Cases

  Given the documented 300-plus year sentence, defense counsel must prepare detailed mitigation evidence including psychological evaluations, background history, and any statutory mitigating factors. Prosecutors should organize aggravating factors and victim impact statements with precision.

• important

  Research Tanubagijo Ruling for Applicable Legal Standards

  Obtain and review the Tanubagijo exoneration order to identify the specific legal standards and evidentiary framework Judge Pendergast applied when evaluating discredited forensic science claims. This ruling is the most detailed available window into his analytical approach.

• important

  Prepare Expert Witnesses on Forensic Methodology

  In any case where forensic evidence is central, retain experts who can speak to the current scientific consensus on the methodology used. Judge Pendergast has shown he will evaluate this question independently.

• Nice

  Review Public Case Coverage for Procedural Patterns

  Because no attorney observation data is available, review news coverage of cases Judge Pendergast has presided over to identify any procedural preferences, scheduling practices, or courtroom management patterns that are publicly documented.

• ›Treat forensic evidence arguments as requiring scientific substantiation, not just prior admissibility — Judge Pendergast has demonstrated he evaluates the current validity of forensic methodologies independently.
• ›In sentencing hearings for serious violent or sexual offenses, present all statutory factors and supporting documentation in organized written form, as the documented sentencing outcomes reflect thorough engagement with the severity of the offense.
• ›Approach post-conviction proceedings with the same rigor as trial-level matters — the Tanubagijo ruling demonstrates that Judge Pendergast conducts substantive review of the evidentiary record in collateral proceedings.