R v Thach

This matter concerned appeals against sentences imposed on Vichat Thach and Quang Minh Chau, who were charged on the same information with causing harm by dangerous driving and leaving the scene of an accident. Thach pleaded guilty to both charges, while Chau was found guilty of the lesser offence of driving in a manner dangerous to the public. The appeals were heard by the Full Court of the Supreme Court of South Australia, comprising Doyle CJ, Gray and White JJ.

The primary legal issue before the court was whether the sentence imposed on Thach was manifestly inadequate, particularly in light of significant amendments to the Criminal Law Consolidation Act 1935 (SA) and the Road Traffic Act 1961 (SA) that substantially increased penalties for such offences. The court was required to consider the impact of these amendments and determine if the original sentence adequately reflected the seriousness of Thach's offending and served the purposes of punishment and general deterrence. A secondary issue concerned Chau's appeal against the licence disqualification period imposed for his conviction.

The court found that the sentence of 12 months imprisonment, suspended on Thach's entering into a recognisance, was manifestly inadequate and failed to maintain adequate standards of punishment and general deterrence. The judges reasoned that the suspension of the sentence would erode necessary deterrent standards and that the punishment imposed did not bear a proper proportion to the seriousness of the offending, which caused serious harm to an innocent victim. The court emphasised that despite Thach's good character and rehabilitation prospects, his conduct was criminal and serious.

Consequently, the Full Court allowed the Director's appeal against Thach's sentence. The original sentence was set aside, and Thach was resentenced to four years and six months imprisonment, with a non-parole period of one year. The court declined to suspend this sentence and imposed concurrent 10-year licence disqualifications for both offences. Chau's appeal against his licence disqualification was not detailed in the provided text, but the court's focus was on the significant increase in Thach's sentence.