Truly tenuous to claim the helicopter incident was the responsibility of the car driver, unless he did something which can be causally attributed to the crash.
Still, if the defendant has a weak attorney maybe the charge can be made to stick. Sanderson‘s attorney in the current Paltrow ski accident case shows just how inept some attorneys can be. And he is surely getting paid a lot more than what this defendant’s attorney is likely to get.
As pilots do we think the driver caused these deaths? Or was it most likely the result of threats and errors that sit with the operation of the helicopter?