The continuing inquest into the death of Belfast schoolboy Noah Donohoe has again highlighted the critical role played by expert witnesses in complex legal proceedings, with significant attention turning to questions of expert independence, professional relationships with instructing parties, and the weight to be attached to specialist opinion evidence.
The proceedings before Belfast Coroner's Court have heard extensive evidence concerning the circumstances surrounding the death of 14-year-old Noah Donohoe, whose disappearance in June 2020 generated widespread public concern across Northern Ireland. The inquest has focused on determining how Noah entered a storm-water drainage system in north Belfast and the events that followed before his body was discovered several days later.
Central to the recent hearings has been the evidence of engineer and hydrologist Jeremy Benn, an expert witness instructed by the Department for Infrastructure (DfI) to provide specialist analysis regarding the design, operation and safety characteristics of the Premier Drive culvert system. Mr Benn returned to the witness box for further examination concerning the drainage tunnel where Noah is believed to have entered the underground network and where his body was subsequently recovered.
The inquest has heard that Noah left his family home in south Belfast on 21 June 2020 intending to meet friends in the Cave Hill area. CCTV evidence tracked portions of his journey before he disappeared. Police investigations subsequently concluded that Noah likely entered the nearby stream culvert at Premier Drive. His body was discovered approximately 600 metres further along the drainage tunnel almost a week later. A post-mortem examination determined that the probable cause of death was drowning.
While the factual circumstances surrounding Noah's final movements remain at the centre of the proceedings, recent hearings have focused heavily upon the expert evidence itself and, in particular, whether the expert appointed to advise the court possessed sufficient independence from the public authority that instructed him.
Scrutiny of Expert Witness Independence
During detailed cross-examination, counsel representing Noah's mother, Fiona Donohoe, explored the longstanding professional relationship between Mr Benn, his consultancy firm JBA Consulting, and the Department for Infrastructure.
The questioning addressed the extent to which Mr Benn and his organisation had undertaken work for government authorities in Northern Ireland over many years. Evidence presented during the inquest suggested that professional links between the consultancy and public infrastructure bodies dated back several decades.
Particular attention was given to Mr Benn's recognised expertise in culvert engineering and flood-risk management. The court heard that he was one of the principal authors of industry guidance produced by the Construction Industry Research and Information Association (CIRIA), widely regarded as an authoritative source of technical standards relating to drainage infrastructure and culvert safety.
The inquest was told that Mr Benn had not only contributed to the development of these guidelines but had also participated in training programmes attended by departmental personnel and engineering consultants responsible for implementing the standards.
Counsel questioned whether such extensive professional interaction with the Department for Infrastructure could create concerns regarding the appearance of independence when later instructed as an expert witness in proceedings examining departmental decisions and infrastructure design.
The issue reflects a broader legal principle governing expert testimony. Courts and tribunals require experts to provide objective and impartial opinions regardless of which party has retained them. The expert's overriding duty is owed to the court rather than to the instructing party. Consequently, any circumstances that might raise questions about impartiality frequently become the subject of rigorous forensic examination.
Previous Involvement Following Noah's Death
Further questioning explored Mr Benn's involvement shortly after Noah's death.
The inquest heard evidence suggesting that advice attributed to Mr Benn had been referenced in communications involving senior officials and public authorities following the incident. Specifically, correspondence discussed engineering measures at the culvert entrance, including the distinction between debris screens and security screens designed to prevent unauthorised access.
Mr Benn explained that his involvement at that stage was limited and stemmed from a brief telephone conversation with an individual who had previously attended one of his professional training courses. He maintained that he had not received formal instructions to undertake an engineering review or approve specific infrastructure arrangements.
Counsel suggested that there appeared to be a discrepancy between the extent of involvement described by public authorities and Mr Benn's own account. The expert rejected any suggestion of deliberate misrepresentation but maintained that his role had been informal and limited.
The exchange illustrated one of the recurring challenges in expert witness practice: ensuring that the scope of an expert's prior involvement is fully disclosed so that the court can properly assess the independence and weight of the resulting opinion evidence.
Assessment of Culvert Risk
A significant portion of Mr Benn's testimony concerned the level of risk presented by the Premier Drive culvert itself.
Counsel characterised the location as an inherently dangerous environment for a child, pointing to factors including darkness, confined conditions, tidal influence, and the considerable length of the underground drainage system.
However, Mr Benn adopted a more measured assessment. Drawing upon his engineering expertise and experience in drainage infrastructure, he declined to categorise the location as "seriously dangerous." Instead, he described it as presenting what he considered a medium level of risk.
His evidence emphasised that risk assessment requires consideration of multiple factors, including the physical characteristics of the site, water flow conditions, gradients, accessibility and foreseeable usage patterns.
Mr Benn also disputed certain descriptions of the culvert approaches, including suggestions that the surrounding banks were exceptionally steep or hazardous. He characterised aspects of the site as comparatively moderate when assessed against other culvert systems encountered during his professional career.
The distinction is legally significant because the court must ultimately determine whether infrastructure arrangements met reasonable safety standards and whether additional protective measures would have been appropriate.
Security Screens and Engineering Judgement
Another important area of expert evidence concerned the use of security screens at culvert entrances.
Counsel challenged Mr Benn regarding comments allegedly made during expert discussions in which he referred to security barriers as "death screens." The phrase attracted considerable attention because of its implication that protective installations may themselves create hazards.
Mr Benn defended his position by referring to historical examples in which security screens had contributed to flooding incidents or created dangers through debris accumulation. He cited several incidents from the United Kingdom and Ireland in support of his engineering analysis.
According to his evidence, improperly designed or maintained security screens can obstruct water flow, increase flood risk and potentially create unforeseen consequences. From an engineering perspective, he argued that risk management requires balancing competing safety considerations rather than assuming that additional barriers automatically improve public safety.
Counsel challenged the relevance of certain examples relied upon by the expert and suggested that he was overstating risks associated with security installations. Mr Benn rejected those allegations and maintained that his conclusions were grounded in established engineering principles and documented case studies.
The exchange highlighted a common feature of expert witness litigation: the testing of methodology, source material, assumptions and conclusions through robust adversarial questioning.
Continuing Proceedings
At the commencement of his evidence, Mr Benn offered condolences to Noah's family and acknowledged the sensitivity of the proceedings. He noted that the terminology used throughout his evidence reflected technical engineering language and was not intended to diminish the tragedy of the circumstances under investigation.
The inquest continues to hear evidence from witnesses and experts as the coroner seeks to establish a comprehensive understanding of the events surrounding Noah Donohoe's death.
For the expert witness community, the proceedings serve as a significant case study in the scrutiny applied to specialist testimony. Beyond the technical engineering issues at the heart of the evidence, the hearings underscore the importance of transparency, independence and methodological rigour whenever expert opinion is placed before a court.
As the inquest progresses, the evidence will continue to demonstrate how expert witnesses can assist legal decision-makers while simultaneously being subject to detailed examination regarding both their conclusions and the foundations upon which those conclusions are based.
By Edward Price
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