Judge Marlo S. Nisperos

Judge Marlo S. Nisperos was appointed to the Solano County Superior Court by Governor Gavin Newsom on March 12, 2024, making her a relatively new member of the bench. Her appointment was notable enough to receive coverage from both the Daily Journal and INQUIRER.net USA, reflecting her significance as a Filipino-American jurist in the region. The available public record confirms she has presided over criminal proceedings in Solano County, including a case involving a Vacaville man charged in connection with a K-9 shooting, reported by the Vacaville Reporter in January and March 2025. Because Judge Nisperos joined the bench in 2024, her judicial record is still developing. No analyzed rulings, attorney observations, or ingested content are available at this time to characterize her ruling patterns, evidentiary preferences, or courtroom management style. Attorneys should treat her as a judge whose tendencies are not yet documented in available legal intelligence databases, and should prepare accordingly by relying on direct courtroom observation and local practitioner networks in Solano County. What is confirmed is that Judge Nisperos handles criminal matters in Solano County Superior Court. Attorneys appearing before her in criminal proceedings should be prepared for a judge who is early in her tenure and who may be establishing her own procedural norms and expectations on the bench.

Given that Judge Nisperos is a newly appointed judge with no available ruling analyses or attorney observations in the current dataset, attorneys cannot rely on established behavioral patterns to calibrate their approach. The most effective strategy is to treat every appearance as an opportunity to make a strong first impression, since early-tenure judges are actively forming their courtroom culture and expectations. Thorough preparation, clear organization of arguments, and strict compliance with local Solano County Superior Court rules are essential baseline requirements. For criminal matters specifically — the confirmed area of her docket — attorneys should ensure all filings are procedurally sound and that arguments are grounded in clear statutory authority and case law. Because no data exists on her sentencing philosophy, evidentiary rulings, or motion practice preferences, attorneys should not assume leniency or strictness in any direction. Consulting with Solano County practitioners who have appeared before her since her March 2024 appointment is the most reliable way to obtain current, firsthand intelligence. Attorneys should also monitor the Vacaville Reporter and other local Solano County outlets for coverage of her rulings, as these have already served as a documented source of information about her courtroom activity. Building a file of any publicly reported decisions will help establish a baseline profile over time.

• critical

  Review Solano County Superior Court Local Rules

  With no judge-specific behavioral data available, strict compliance with Solano County local rules is the most reliable foundation for any appearance. Review all applicable local rules before filing or appearing.

• critical

  Consult local Solano County criminal practitioners

  Attorneys who have appeared before Judge Nisperos since her March 2024 appointment are the best available source of firsthand intelligence on her courtroom style, preferences, and expectations.

• important

  Monitor Vacaville Reporter for case coverage

  The Vacaville Reporter has already reported on at least one of her criminal cases in 2025. Monitoring this outlet for future coverage can help build a factual record of her rulings and courtroom conduct.

• important

  Review Governor's appointment announcement

  The official gubernatorial appointment announcement and associated Daily Journal coverage may contain background information about her prior legal career that can inform understanding of her professional perspective.

• important

  Prepare thorough written submissions

  In the absence of data on her oral argument preferences, well-organized and thoroughly cited written submissions ensure your position is fully documented regardless of how much time she allocates to oral argument.

• ›Treat every appearance as a first impression — Judge Nisperos is early in her tenure and her courtroom norms are still being established.
• ›Arrive fully prepared on procedural requirements; do not assume flexibility on deadlines or filing requirements from a newly appointed judge building her courtroom culture.
• ›Comply strictly with Solano County Superior Court local rules, as these are the documented baseline for all practitioners appearing in this court.
• ›In criminal proceedings, be prepared to address both substantive and procedural issues clearly, as her confirmed docket includes criminal matters requiring organized, statute-grounded argument.