A federal jury in Miami has ordered Tesla Inc. to pay about $243 million in damages after finding the company’s Autopilot driver-assist system partially responsible for a 2019 fatal crash in Key Largo, Florida. The verdict, delivered late Friday, marks the first U.S. wrongful-death case involving a third party that has gone to trial over Autopilot and ended with Tesla held liable. Jurors concluded the technology failed to prevent the collision that killed 22-year-old Naibel Benavides Leon and seriously injured her boyfriend, Dillon Angulo. The couple were standing beside their parked Chevrolet Tahoe when a Model S, driven by George McGee with Autopilot engaged, ran a stop sign at about 62 mph after he looked away to retrieve a dropped mobile phone. The panel awarded $129 million in compensatory damages and $200 million in punitive damages, assigning Tesla 33 percent of the compensatory share but the full punitive award, for a total near $243 million against the company. McGee was deemed responsible for the remaining compensatory portion but faces no punitive penalties. Tesla said it will appeal, calling the verdict “wrong” and warning it could slow the adoption of life-saving technology. The decision adds to mounting legal and regulatory scrutiny of Autopilot, which the National Highway Traffic Safety Administration has linked to dozens of deaths, and comes as Chief Executive Officer Elon Musk seeks approvals for a commercial robotaxi service.