The High Court allowed an appeal by the Director of Public Prosecutions after a District Court judge dismissed a drunk-driving prosecution over whether a Garda had validly formed the opinion needed to arrest the accused. The case was remitted to the District Court.
The appeal came by way of case stated, asking whether the District Court judge was correct in finding that the Garda had not validly formed the necessary opinion and in dismissing the case on that basis. The High Court answered both questions “No”.
The prosecution was brought under section 49(4) of the Road Traffic Act 1961, as amended. At a mandatory alcohol testing checkpoint, the Garda required the accused to provide a preliminary roadside breath specimen. He testified that the result was “positive” and that he then formed the opinion required for an arrest under section 49(8).
The defence had not challenged the reasonableness of that opinion in cross-examination. After both sides had presented their cases, the District Court judge raised a concern that “positive” might describe different readings on the breath-testing equipment then in use. The Garda was not recalled to explain the basis for his opinion, and the judge dismissed the prosecution because he was not satisfied the arrest was valid.
The High Court held that a positive breath-test result could support a Garda’s opinion that an offence had been committed, and that the newer testing regime did not change that principle. It said the Garda’s evidence that he had formed the required opinion was unchallenged. If the District Court judge had concerns, he should have recalled the Garda and questioned him during the trial, giving the prosecution an opportunity to address them.
The ruling did not determine the accused’s guilt or acquit him. It set aside the dismissal and sent the case back to the District Court.