R v Sully

The appellant, R v Sully, appealed against his convictions for causing death by dangerous driving, causing harm by dangerous driving, and leaving the scene of an accident after causing death by careless driving. The convictions arose from a street race with another driver, Fenney, whose vehicle collided with a third car carrying the victims. The appellant was charged on the basis that he aided and abetted Fenney's dangerous driving. The appeal was heard by Sulan, Vanstone, and Anderson JJ of the Supreme Court of South Australia.

The central legal issues before the court were whether the appellant had effectively withdrawn from the common purpose of the street race before the collision occurred, thereby ending his criminal responsibility as an aider and abettor. This involved determining what constitutes a sufficient withdrawal, specifically whether a unilateral decision to cease participation is enough, or if communication of this abandonment to the principal offender is required. Additionally, the court considered whether the appellant was "involved in an accident" within the meaning of the statutory provisions requiring a driver to stop at the scene of a crash. Finally, the court addressed whether the verdicts were unsafe or unsatisfactory, including whether the trial judge erred in finding the appellant was a substantial cause of the accident despite a bush obscuring the victims' view of oncoming traffic.

The court surveyed authorities on the requirements for an aider and abettor to effect withdrawal from a common unlawful purpose. It was held that the trial judge's finding that the appellant's abandonment of the race was "too late" and that his encouragement was still "operating" at the time of the collision was crucial. The court affirmed that for withdrawal to be effective in negating criminal responsibility, it must be timely and, in some circumstances, communicated to the principal offender. The appellant's argument that a unilateral decision to slow down was sufficient was not accepted as a basis for overturning the conviction. The court also found that the appellant was indeed "involved in an accident" as contemplated by the relevant legislation.

The court dismissed the appeal against conviction and sentence, refusing permission to appeal on one ground. The judges agreed with the orders proposed and the reasons given by Justice Vanstone.