Gopalakrishnan v Home Office: Independence and Care in Expert Evidence

Expert evidence can have a decisive influence on the outcome of legal proceedings. That influence makes independence, careful reasoning and proper investigation essential. The case of Gopalakrishnan v Home Office provides a useful illustration of why an expert must not simply adopt one party's account without testing it against the available evidence.

The danger of accepting an account without proper scrutiny

A psychiatrist may need to rely on information supplied by a patient and, where appropriate, by a third party. That reliance is not automatically improper. The difficulty arises when the account is treated as established fact, rather than as one source of evidence requiring assessment and corroboration.

In this case, the reporting process was criticised because inconsistencies in the story were not investigated. A robust expert assessment should identify discrepancies, consider their possible significance and explain whether they affect the reliability of the conclusions reached.

The expert's duty to remain independent

An expert's duty is to assist the court, not to act as an advocate for the person who instructed them or for the account on which their opinion is based. This means considering alternative explanations, acknowledging uncertainty and addressing material evidence that does not support the preferred conclusion.

Being independent does not mean being hostile or unsympathetic to a patient. It means applying the same professional standards to information that supports the opinion and information that undermines it. Where the evidence is incomplete or contradictory, the report should say so clearly.

Undisclosed relationships and financial motives

The case also highlights the importance of examining the relationship between the people providing the account. Here, both parties were found to have deliberately falsified a story for financial gain, while failing to disclose their relationship with each other. That matters because the source, independence and motivation of the information are all relevant to the weight that can safely be placed on it.

A failure to disclose a relationship can prevent the expert from properly evaluating collusion, shared incentives or the possibility that evidence has been coordinated. Asking straightforward questions about how witnesses know each other, their communications and any financial interests may therefore be central to a reliable assessment.

Practical lessons for expert reporting

The broader lesson is that an expert report should show the reasoning process, not merely state a conclusion. The expert should record the information relied upon, identify inconsistencies, test plausible alternatives and explain why one interpretation is preferred over another.

Experts should also distinguish between a patient's account, a third party's account and independently verified facts. Where the evidence cannot be verified, that limitation should be made explicit. A balanced report is not partisan simply because it reaches a conclusion; it becomes partisan when it ignores material problems with the evidence or fails to consider reasonable alternatives.

Gopalakrishnan v Home Office therefore serves as a reminder that expert evidence must be independent, transparent and evidence-based. Careful investigation of inconsistencies and relationships is not an optional extra: it is part of the discipline required to ensure that expert opinion genuinely assists the court.

This article is a general discussion of the principles raised by the case and is not legal advice. The judgment and the full factual and procedural context should be consulted before relying on any particular proposition.

The overriding duty of the expert is to the court. That duty can be forgotten when an expert becomes too closely aligned with the account advanced by one party. This undermines the court's ability to reach a reliable conclusion, particularly where the experts disagree on the substance of the claim. In those circumstances, each expert should explain the basis of their opinion, engage with the opposing evidence and identify the limits of what can properly be concluded.