Judge Daniel A. Flores

Judge Daniel A. Flores serves on the San Francisco Superior Court, having taken the bench in January 2015. While the available data on his San Francisco docket is limited, public coverage of his work on a high-profile environmental contamination case in Modesto — involving chemical industry giants Dow and PPG — provides meaningful insight into his judicial temperament and priorities. Most notably, Judge Flores demonstrated a willingness to impose sanctions against municipal plaintiffs for discovery failures, including missing reports, and separately faulted the City of Modesto for the destruction of sewer inspection records. These actions signal a judge who takes litigation conduct and evidentiary integrity with the utmost seriousness, regardless of the identity or institutional weight of the party before him. The sanctions and spoliation findings are particularly telling. Judges who impose sanctions against governmental plaintiffs — entities that often receive deference — are signaling that procedural compliance is non-negotiable. Judge Flores appears to hold all parties to the same standard, which suggests he will not tolerate discovery gamesmanship, delayed production, or careless document management from any litigant. His rulings in the Modesto matter, covered by Law360, Mealey's, and the Modesto Bee between 2023 and 2025, paint a picture of a jurist who is methodical, evidence-focused, and unafraid to use the court's coercive powers to enforce compliance. Given the limited volume of analyzed rulings and attorney observations specific to his San Francisco courtroom, attorneys should treat these findings as directional rather than definitive. The core takeaway is clear: Judge Flores rewards disciplined, well-documented litigation practice and penalizes sloppiness in discovery and records management. Attorneys appearing before him should approach every procedural obligation as if it will be scrutinized.

The most actionable intelligence from Judge Flores's public record is his demonstrated intolerance for discovery violations and spoliation of evidence. Attorneys should treat every discovery deadline, meet-and-confer obligation, and document preservation duty as a hard line, not a soft guideline. If you represent a party with any document retention vulnerabilities — particularly in cases involving environmental, regulatory, or municipal records — conduct a thorough litigation hold audit before your first appearance and be prepared to affirmatively represent to the court that appropriate preservation steps have been taken. When bringing or opposing discovery motions before Judge Flores, lead with the procedural record. His rulings suggest he will carefully examine the timeline of discovery conduct, including when requests were made, when responses were due, and what steps were taken to comply. Attorneys who can demonstrate a clean, documented record of good-faith compliance will be well-positioned. Conversely, attorneys who rely on informal understandings or undocumented extensions do so at their peril. Confirm all agreements in writing and file stipulations where appropriate. On substantive arguments, the available data does not yet reveal strong preferences for particular legal frameworks or argument styles. However, his willingness to rule against a governmental plaintiff suggests he is not swayed by institutional prestige or political considerations. Frame arguments on the merits and the record, not on the identity of your client. Avoid appeals to equitable sympathy that are not grounded in documented facts — this judge appears to follow the evidence.

• critical

  Audit Litigation Hold and Document Preservation

  Before any appearance, confirm that your client has a documented litigation hold in place covering all potentially relevant materials. Given Judge Flores's spoliation finding against the City of Modesto, any gap in preservation — particularly for institutional or corporate clients with routine destruction policies — must be identified and addressed proactively.

• critical

  Compile a Complete Discovery Compliance Timeline

  Prepare a written chronology of all discovery requests, responses, extensions, and meet-and-confer communications. If a discovery dispute arises, Judge Flores will likely examine the procedural record closely. Having this timeline ready demonstrates good faith and positions you to rebut any accusations of delay or non-compliance.

• important

  Document All Discovery Agreements in Writing

  Confirm every extension, modification, or informal agreement with opposing counsel via email or stipulation. Oral agreements that are later disputed will not protect you before a judge who has sanctioned parties for discovery failures. File stipulations with the court where appropriate.

• important

  Research San Francisco Local Rules and Department Practices

  Because the primary available data comes from a case outside San Francisco, attorneys should independently research Judge Flores's San Francisco department practices, including tentative ruling procedures, preferred motion formats, and any standing orders. Contact the clerk's office or consult attorneys with recent direct experience in his courtroom.

• important

  Prepare Sanctions Motion or Opposition Framework

  If discovery conduct by either party is at issue, prepare a detailed factual record supporting or opposing sanctions before the hearing. Judge Flores has shown he will act on well-supported sanctions requests. Anticipate that the court will scrutinize the conduct of both sides.

• Nice

  Review Opposing Party's Document Retention Practices

  In cases involving institutional defendants or plaintiffs, investigate whether the opposing party has a documented litigation hold and whether any routine destruction occurred after litigation was reasonably anticipated. Judge Flores's Modesto ruling shows he will make adverse findings on spoliation when the record supports it.

• ›Treat every procedural deadline as absolute — do not assume informal extensions will be honored without written confirmation and, where appropriate, a filed stipulation.
• ›Be prepared to account for your client's document preservation practices if asked; Judge Flores has shown he will inquire into records management and will make adverse findings when destruction is unjustified.
• ›Present arguments grounded in the factual and procedural record rather than appeals to your client's institutional identity or equitable sympathy — this judge evaluates conduct on the merits.
• ›If you are moving for or opposing sanctions, bring a complete, organized timeline of the discovery conduct at issue; Judge Flores appears to conduct a careful factual analysis before imposing or denying sanctions.
• ›Maintain professional, measured courtroom demeanor; a judge willing to sanction a municipal government is unlikely to be swayed by advocacy that substitutes volume or indignation for documented facts.