SUPREME COURT OF SOUTH AUSTRALIA
(Magistrates Appeals: Criminal)
DOUGLAS v POLICE
[2011] SASC 50
Judgment of The Honourable Justice Sulan
11 April 2011
CRIMINAL LAW - PARTICULAR OFFENCES - DRIVING OFFENCES - SO UNDER INFLUENCE OF LIQUOR OR DRUGS AS TO BE INCAPABLE OF CONTROL - PROOF AND EVIDENCE
Appellant convicted of the offence of driving a motor vehicle while there was in his blood the prescribed concentration of alcohol - appealed against conviction - whether reading obtained from the breath analysis instrument could be reconciled with blood test result - whether reading obtained from breath analysis instrument exaggerated - whether presumption in s 47K rebutted - whether expert evidence as to alcohol elimination rates explained disparity between breath analysis instrument reading and blood test result - appeal allowed - conviction quashed and verdict of not guilty substituted.
Road Traffic Act 1961 (SA) s 47B(1)(a), s 47K(1), s 47K(1a), s 47K(1a)(b), referred to.
Evans v Benson (1986) 46 SASR 317; Tonkin v Police (2006) 95 SASR 36; Police v Shelmerdine (2000) 76 SASR 199, considered.
DOUGLAS v POLICE
[2011] SASC 50Magistrates Appeal: Criminal
SULAN J: This is an appeal against conviction.
On 23 December 2010, the defendant, Jason Robert Douglas, was convicted by a Magistrate of the offence of driving a motor vehicle while there was present in his blood the prescribed concentration of alcohol, contrary to section 47B(1)(a) of the Road Traffic Act 1961 (SA).
The defendant asserts that the reading obtained from the breath analysis instrument was exaggerated and cannot be reconciled with the results of a blood test which was undertaken approximately two hours after the breath analysis. The defendant contends that the Magistrate erred in concluding that the defendant had failed to prove that the breath analysis result was exaggerated and that the presumption as to the accuracy of the result had been rebutted.
Facts
On 10 April 2010 at about 9.40 pm, the defendant was driving on Red Hill Road at Scott Creek when he was stopped by police who conducted an alcotest. The alcotest returned a positive reading. The defendant was taken to the Mount Barker Police Station, where he was required to undertake a breath analysis test. The defendant’s breath sample was provided at 10.20 pm and returned a reading of 0.098 grams of alcohol in 100 millilitres of his blood. I shall refer to grams of alcohol in 100 millilitres of blood as a percentage throughout the judgment. A blood sample test kit was provided to the defendant. The defendant had expressed surprise when the breath analysis recorded a reading of 0.098 per cent, as he had told police that he had only consumed four cans of full-strength beer between 4.30 pm and 6.00 pm. The police provided the defendant with an alcohol blood test kit which he took with him to the Mt Barker Hospital.
On 11 April 2010 at 12.30 am, some two hours and ten minutes after the initial breath analysis, the defendant provided a…
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CaseChat Overview and Summary
The legal issues before the court were whether the breath analysis reading of 0.098 per cent could be reconciled with the blood test result of 0.034 per cent, and whether the breath analysis result was exaggerated within the meaning of s 47K(1a) of the Act. The court had to determine if the defendant had rebutted the presumption in s 47K(1) that the breath analysis result was accurate. This involved examining the expert evidence on alcohol elimination rates and whether it could account for the disparity between the two test results.
The court examined the expert evidence presented by Mr Felgate, a forensic scientist, who explained that individuals with a high tolerance to alcohol, such as alcoholics, can have elimination rates higher than 0.026 per cent. However, Mr Felgate testified that it was unlikely for a social drinker like the defendant to have an elimination rate greater than 0.02 per cent. The Magistrate had concluded that the breath analysis result and the blood analysis result were reconcilable, allowing for the defendant having a normal elimination rate albeit at the higher end of the normal range. The court found that the Magistrate’s conclusion was not supported by the evidence and that the breath analysis result could not be reconciled with the blood test result. Furthermore, the court found that the breath analysis result was an exaggerated reading, thereby rebutting the presumption in s 47K(1) of the Act.
The final orders of the court were to allow the appeal, quash the conviction, and substitute a verdict of not guilty for the defendant. The court found that the breath analysis result was exaggerated and could not be reconciled with the blood test result, thereby rebutting the presumption of accuracy under s 47K(1) of the Act.
Orders
Orders of the court
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Background
Background to the litigation
Evidence
Evidence Before The Court
Decision
Reasons for decision
Ratio Decidendi
Legal Principle Established
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