NTSA Articles

Pre-litigation consultations are a common entry point for expert engagement. Initial contact may occur through informal consultation, site inspection, or general inquiry regarding observed conditions. At that stage, the matter may not yet be framed as a dispute.

When litigation develops, this pre-litigation consultation may become part of the evidentiary record.

In such cases, the issue is not limited to whether the expert may testify, but whether the prior role affects the perceived independence and consistency of the expert’s later opinions.

Early Involvement, Disclosure, and Role Transition

An expert who begins as a consultant and is later retained as a testifying witness may be subject to scrutiny regarding earlier communications, observations, and preliminary conclusions. Documents created during the initial phase, including reports, emails, and field notes, may be compared against later opinions.

Differences between early observations and subsequent conclusions do not necessarily indicate error. However, where such differences are not explained within the context of additional data or expanded investigation, they may be characterized as inconsistency.

The nature of the initial engagement is therefore relevant. Where early involvement was limited to general observation or preliminary assessment, subsequent testimony may remain consistent with an independent role, provided that prior work is disclosed and evaluated in context.

Where initial involvement included participation in legal strategy, coordination with counsel, or development of claims, the expert’s role may be viewed as aligned with that party. Under such conditions, subsequent testimony may be subject to challenge based on lack of independence.

Disclosure of prior involvement is a central factor in how such engagements are evaluated. Identification of earlier work, including scope, timing, and available documentation, allows the retaining party to assess potential exposure and determine whether continued engagement is appropriate.

Earlier materials, including informal communications, may also become part of the record. These documents are often created without the structure or completeness of formal reports and may reflect preliminary impressions rather than final conclusions. In litigation, they may nevertheless be presented as substantive evidence.

Physical materials generated during early involvement, including photographs, samples, or field data, may also be subject to scrutiny. Where such materials are later relied upon, questions may arise regarding documentation, handling, and traceability.

In some cases, the extent of prior involvement may create conditions under which continued participation as an independent expert is subject to challenge. The determination is not based solely on actual bias, but on whether the circumstances reasonably call impartiality into question.

Conclusion

Pre-litigation consultation introduces variables that may affect later expert involvement. Prior observations, communications, and materials may become part of the evidentiary record and influence how subsequent testimony is evaluated.

Where early involvement is clearly defined, disclosed, and consistent with later findings, the transition to formal expert work may be supported. Where it is not, the issue may extend beyond technical analysis to questions of credibility and independence.

In construction defect litigation, the weight of an expert’s opinion is closely tied to how prior involvement is understood within the context of the case.

NTSA Caveat

This article is based on field observations, case reviews, and professional experience. It is intended to highlight patterns relevant to construction defect evaluation. Final determinations should be made based on project-specific documentation, testing, and coordination with all relevant parties.

National Tile and Stone Authority (NTSA) provides forensic consulting and expert witness services in tile and stone-related matters.