Background
Robert Hetsler purchased a used, low-mileage Roush Ford Mustang that had been modified by Roush before its sale by a Ford dealer. Shortly after the purchase, the Mustang exploded during use, catastrophically and permanently injuring Hetsler. His experts could not identify the explosion’s precise cause but considered a brake-fluid leak igniting on the hot engine the most likely explanation.
The parties initially tried the case on the theory that the Mustang exploded while parked and idling as Hetsler slept inside. After an undeposed firefighter unexpectedly testified that Hetsler may have said the vehicle exploded while he was driving, Hetsler changed his theory mid-trial. Ford continued to argue that the Mustang was parked, contending that a lit cigarette—not a vehicle defect—caused the fire. The trial court denied Ford’s directed-verdict motions, permitted the jury to consider the Cassisi inference that a defect may be inferred when a product malfunctions during normal use, and the jury returned a verdict for Hetsler.
The Court’s Holding
The Fifth District affirmed without deciding whether the trial court substantively erred in applying the Cassisi inference. The court held that Ford failed to carry its appellate burden because its initial brief did not adequately develop the important factual and legal issues necessary to demonstrate reversible error. It denied Ford’s motion for a written opinion but, on its own motion, withdrew its earlier per curiam affirmance and issued the written opinion.
The court identified multiple briefing defects: unsupported characterizations of the Roush modifications; a conclusory challenge to the evidence of normal use; failure to disclose that Ford itself continued advancing the parked-and-idling theory; failure to confront Cassisi’s language and decisions applying similar inferences to vehicles; and failure to challenge the trial court’s stated reasons for rejecting Ford’s missing-evidence argument. Judge Boatwright separately concurred that, even if the briefing had been sufficient, the trial court correctly allowed the inference because the evidence supported a finding that the nearly new, low-mileage Mustang caught fire during normal use.
Key Takeaways
- The court affirmed because Ford inadequately briefed its claims, not because the majority adopted or expanded the Cassisi inference.
- An appellant must support material factual assertions with accurate record citations and address the trial court’s actual reasoning, controlling doctrine, and important issues along the decisional path.
- A per curiam affirmance without opinion has no precedential value beyond res judicata and does not reveal the appellate court’s reasoning.
Why It Matters
The decision is a pointed warning that appellate courts will not reconstruct complex or novel arguments for litigants. Conclusions, selective descriptions of the record, and failure to engage contrary authority can prevent merits review even in a heavily litigated case involving a substantial verdict.
The majority deliberately left the permissible scope of Florida’s Cassisi inference unresolved. Judge Boatwright’s separate concurrence nevertheless offers a merits-based view that the inference may reach a vehicle fire when evidence shows the vehicle malfunctioned during ordinary driving or idling and was still new, lightly used, unrepaired, and not abnormally operated.