A suspended driver has been jailed for nine years after driving dangerously at double the speed limit before a horror crash that killed two siblings.Johnson Kokozian, 23, was taking his friends on a joyride in his brand new SUV when he tried to overtake a car at Heckenberg, in south-west Sydney, in 2023.The suspended driver had crossed the Mercedes-Benz AMG onto the wrong side of the road at double the 50km/h speed limit when he crashed head-on into a car