A Tesla driver was killed and a passenger was critically injured Saturday when the car ploughed into a firetruck that was parked on a Northern California freeway to shield a crew clearing another accident, fire officials said. Four firefighters who were in the truck when it was struck on Interstate 680 were treated for minor injuries, said Tracie Dutter, assistant chief of the Contra Costa County Fire Protection District.The driver was declared dead at the scene, Dutter said. The car needed to be cut open to remove the passenger, who was taken to the hospital.