The High Court has delivered what many will regard as a common-sense ruling in a drug prosecution case, rejecting an argument that could have imposed significant additional burdens on Garda investigations and criminal trials.
The ruling arose from a prosecution of a man charged with possession of cannabis for sale or supply following a Garda operation on Dublin’s Parnell Street in April 2024.
The High Court rejected an attempt to challenge the drug prosecution on the basis that the Gardaí could not account for every stage in the handling of the cannabis after it was handed over to Forensic Science Ireland.
In a judgment delivered on 10 November, Mr Justice Conleth Bradley confirmed that prosecutors are not required to account for every individual who handled a drug exhibit after it was delivered to Forensic Science Ireland (FSI).
During District Court proceedings, the defence argued that there was “no case to answer” because the State had failed to establish an unbroken chain of custody within FSI.
While Gardaí gave evidence that the suspected drugs had been seized, sealed, securely stored and later delivered to the State laboratory, the defence contended that prosecutors had failed to explain how the exhibit was received, stored and handled within the forensic system.
If that argument had succeeded, it could have required prosecutors in routine drug cases to call multiple additional witnesses merely to establish the internal movement of exhibits through a State laboratory.
Instead, the High Court firmly ruled in favour of the prosecution.
The court referred to the Supreme Court decision in Ratinskis v DPP, which held that gaps or deficiencies in the chain of custody do not automatically render evidence inadmissible. Such issues may affect the weight a court accords to evidence, but they are not, in themselves, grounds for excluding it.
Mr Justice Bradley found that the evidence before the court was capable of supporting the conclusion that the substance analysed by FSI was the same material seized by the Gardaí.
A forensic analysis certificate, signed by Dr Francine Kivlehan, recorded that five bags of plant material, weighing 21.607 grams in total, were submitted to the laboratory.
The certificate further stated that three of those items were analysed and that the substance identified was cannabis.
Answering questions referred by the District Court, the High Court held that prosecutors need not call additional witnesses to explain the receipt, storage or handling of exhibits within FSI before relying on a statutory forensic certificate.
The court also rejected the argument that the State must issue a separate certificate under the Criminal Justice (Miscellaneous Provisions) Act 2023 before relying on a forensic drugs analysis certificate.
The judgment is likely to be seen as a significant victory for the prosecution of drug offences. It confirms that criminal trials cannot be derailed by demands for evidence on every administrative step taken in a forensic laboratory, provided there is sufficient evidence linking the analysed substance to the material originally seized by Gardaí.
More broadly, the ruling reinforces the principle that courts should focus on the reliability and substance of evidence rather than imposing unnecessary procedural hurdles that add little to the pursuit of truth.