Coughlan v The Queen

In *Coughlan v The Queen*, the High Court of Australia considered an appeal against convictions for arson and attempted fraud. The prosecution's case was based on circumstantial evidence, including the appellant being seen running from the scene of an explosion and fire that destroyed his house, and his subsequent insurance claim. The appellant maintained a version of events consistent with innocence, and there was no apparent financial motive for the offences. The central question was whether the jury could have been satisfied of the appellant's guilt beyond reasonable doubt, given the circumstantial nature of the evidence and the possibility of an innocent explanation for the explosion.

The legal issues before the High Court were whether the evidence was sufficient to allow a jury to be satisfied of the appellant's guilt beyond reasonable doubt, and specifically, whether the prosecution had excluded the reasonable possibility that the explosion was caused by a build-up of gaseous vapours ignited by an electrical fire, rather than by the appellant's deliberate actions. The court also considered the significance of scientific evidence regarding petrol residues found on the appellant's clothing.

The High Court reasoned that the scientific evidence concerning petrol residues on the appellant's clothing was not sufficiently compelling to exclude a reasonable possibility of an innocent explanation for the explosion. While petrol residues were detected on the appellant's tracksuit pants and shoes, the expert evidence did not establish the quantity of residues, the age of the contact with petrol, or whether such residues could have been present from an innocent source. Furthermore, there was no evidence of petrol residues within the house itself, which was a crucial element for establishing arson by accelerant. The court found that the prosecution had not discharged its burden of proof to exclude all reasonable doubt, particularly the possibility that the explosion was caused by a build-up of gas ignited by an electrical fault.

Consequently, the High Court allowed the appeal, quashed the appellant's convictions for arson and attempted fraud, and entered verdicts of acquittal on each count.