Background
Koi Design LLC retained Marron Lawyers, APC to represent it in a trademark dispute with Strategic Partners, Inc. Marron associate A. Douglas Mastroianni served as lead counsel. While employed by Marron, Mastroianni missed deadlines, failed to participate in required case-management procedures, and violated the firm’s policy for monitoring electronic court notices. Marron did not tell Koi about those problems or about internal concerns that Mastroianni posed malpractice and client-relations risks.
Marron terminated Mastroianni in May 2017, but he continued representing Koi after joining another firm. The trademark case ultimately ended in terminating sanctions, a default judgment, and an award exceeding $5.2 million, including treble damages. Koi later filed for bankruptcy and sued Marron for legal malpractice, breach of fiduciary duty, and negligent supervision under California law. The district court granted Marron summary judgment on all three claims for lack of causation.
The Court’s Holding
The Ninth Circuit reversed and remanded. It first rejected Koi’s procedural argument under Federal Rule of Civil Procedure 56(f)(2), holding that the district court decided summary judgment on causation—a ground the parties had addressed—and therefore did not rely without notice on a ground that Marron had never raised.
On the merits, the majority held that genuine disputes of material fact existed as to breach and causation. A reasonable jury could find that Marron breached duties to disclose material developments in the trademark litigation and adequately supervise its employees. The court explained that violations of California’s professional-conduct rules may supply evidence of a breach of fiduciary duty or the standard of care.
The majority further held that a jury could find Marron’s conduct caused Koi’s loss under the applicable but-for analysis. The record permitted findings that competent counsel would likely have produced a more favorable judgment and that, had Marron disclosed Mastroianni’s misconduct, Koi would have replaced him. Judge Ronald Lee Gilman dissented as to the malpractice and negligent-supervision claims but agreed that the fiduciary-duty claim presented a triable causation issue.
Key Takeaways
- A law firm’s failure to disclose an attorney’s serious case-management problems can support malpractice and breach-of-fiduciary-duty claims under California law.
- Professional-conduct rules may help establish both an attorney’s fiduciary obligations and the standard of care in a malpractice action.
- Evidence that the client would have replaced deficient counsel, and that competent representation likely would have produced a better result, can create a jury question on but-for causation.
Why It Matters
The decision emphasizes that a firm may face liability not only for an employed lawyer’s litigation errors but also for failing to supervise that lawyer and warn the client about known performance concerns. Later misconduct by the departed lawyer did not eliminate triable causation questions where the firm’s nondisclosure allegedly allowed the representation to continue.
The ruling does not establish Marron’s liability. It holds that Koi produced enough evidence for a jury, rather than a court on summary judgment, to resolve the disputed issues of breach and causation.