A man in Sydney has been charged with two counts of aggravated dangerous driving occasioning death after a car crash that killed a brother and sister. The driver’s father, girlfriend, and another man have also been charged with hindering the investigation. The crash occurred on September 1 when a black Mercedes collided with a Toyota Echo before hitting another vehicle and flipping over. The driver of the Echo and her brother died at the scene. The accused driver has been denied bail and his father has been granted conditional bail, with both due to appear in court.