A California appeals court has upheld a jury's verdict in favor of American Medical Response West, affirming that the company was not negligent in a car accident involving its ambulance. The case, O'Connor v. American Medical Response West (A173945), centers on a collision that occurred in San Francisco in August 2022, affecting plaintiff Adam O’Connor, who claimed injuries and property damage.

The court's ruling is significant for personal injury cases as it reinforces the importance of substantial evidence in supporting claims of negligence. The decision also highlights the challenges faced by individuals representing themselves in court.

Background

Adam O’Connor filed a complaint against American Medical Response West in November 2022, alleging negligence after an accident with one of the company’s ambulances. The trial took place over 11 days in April 2025, where both parties presented their accounts of the incident. O’Connor represented himself during the trial.

The accident occurred on August 4, 2022, when O’Connor was driving his red Hyundai north on Guerrero Street in San Francisco. He claimed he was preparing to make a left turn at an intersection when the ambulance, operated by employee S. Yamaguchi, collided with his vehicle. Yamaguchi testified that O’Connor had entered his lane without signaling and stopped at a green light, which led to the collision.

During the trial, evidence included a dashboard camera recording from the ambulance, which played a crucial role in the jury's deliberation. The jury ultimately found that American Medical Response West was not negligent, leading O’Connor to appeal the decision.

The Ruling

The California Court of Appeal ruled in favor of American Medical Response West, affirming the jury's verdict. The court stated, “The presumption a judgment is correct is not only a general principle of appellate practice but an ingredient of the constitutional doctrine of reversible error.” This ruling emphasized that O’Connor failed to provide sufficient evidence to support his claims of negligence.

Judge Tucher, along with Justices Petrou and Rodríguez, noted that O’Connor's appeal did not adequately address the substantial evidence standard required to overturn a jury's decision. The court found that O’Connor had waived his claims by not presenting them properly in his opening brief.

Impact

The court's decision in O'Connor v. American Medical Response West serves as a reminder of the high burden of proof required in negligence cases. It underscores the necessity for plaintiffs to provide substantial evidence and properly articulate their claims, especially when representing themselves. The ruling may also influence future personal injury cases where plaintiffs face similar challenges in proving negligence.

Additionally, this case highlights the importance of accurate and detailed record-keeping during trials, as O’Connor's failure to provide proper citations and summaries weakened his position on appeal. The ruling could deter individuals from pursuing self-representation in complex legal matters without adequate preparation.

What's Next

O’Connor has the option to seek further legal counsel to explore the possibility of appealing the decision to a higher court, although the likelihood of success may be limited given the appellate court's findings. There are no related cases pending at this time.