Antitrust law
How to structure internal antitrust investigations to ensure evidence preservation, lawful privilege assertions, and defensible outcomes.
A disciplined, legally sound approach to internal antitrust investigations safeguards evidence, upholds privilege, and yields credible, defensible conclusions essential for compliance and governance.
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Published by Aaron Moore
August 04, 2025 - 3 min Read
In designing an internal antitrust investigation, organizations should begin with a written mandate that precisely defines scope, objectives, and boundary conditions. This framework guides investigators through complex questions about market behavior, potential collusion, or exclusionary practices without wandering into extraneous matters. A clear charter helps allocate resources efficiently, assigns decision rights, and establishes timelines that align with regulatory expectations. Early, explicit communication with senior leadership reinforces impartiality and reduces perceived conflicts of interest. A well-documented mandate also supports later privilege claims and evidentiary handling, because the boundaries of inquiry are transparent, limiting later dispute over what is relevant or privileged.
To preserve evidence effectively, firms must implement a comprehensive data governance plan before any inquiry proceeds. This plan identifies custodians, data sources, and preservation obligations, with specific steps to halt routine deletion or automatic destruction. It should include a chain-of-custody protocol that records who accessed material, when, and for what purpose. Technology controls—such as immutable backups, secured storage, and audit trails—are essential, as is a schedule for phased data collection that minimizes disruption to business operations while capturing potentially relevant communications, documents, and transactional logs. Training sessions for staff, counsel, and IT personnel reinforce proper handling and reduce inadvertent spoliation risks.
Building a robust evidence handling and interview program
As privilege issues arise, counsel must determine when to assert attorney-client protections and work-product doctrine while maintaining ongoing cooperation with regulators. A privilege log should be maintained meticulously, detailing the nature of withheld documents, the reason for privilege, and the identities of participants. The privilege framework should be embedded in the investigation plan, with clear criteria for non-privileged materials that can be shared for remediation or corrective action. Courts often scrutinize the proportionality and purpose of privilege in investigative contexts, so it's essential to distinguish strategic communications from ordinary business records. Regular reviews help ensure that privilege claims remain appropriate as the investigation evolves.
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Additionally, investigators should implement a privilege-preserving workflow that segregates legal analysis from factual findings. This separation minimizes exposure of sensitive legal reasoning in non-privileged materials and supports defensible conclusions if the investigation's results become public or subject to regulatory review. Documentation should reflect the reasoning process, but avoid disclosing privileged legal conclusions beyond what is necessary. When confronted with potential waivers, counsel can assess whether disclosure is voluntary, compelled, or compelled by regulatory obligation, and adjust the handling strategy accordingly. A disciplined approach reduces the risk of inadvertent disclosure while maintaining credible, transparent governance.
Ensuring regulatory alignment and defensible conclusions
A structured interviewing protocol is crucial for obtaining reliable testimony while protecting rights and privileges. Interviewers should prepare an interview plan that outlines objectives, key questions, and anticipated challenges. Recording decisions—whether by audio, video, or transcript—must comply with applicable privacy and labor laws, and participants should be informed about confidentiality limits. The process should include real-time assessment of credibility, corroboration requirements, and identification of potential biases. To ensure consistency, interview teams should receive training on avoiding leading questions, maintaining neutrality, and documenting impressions without overinterpreting them. The goal is to gather accurate facts while preserving the integrity of the investigative record.
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In parallel with interviews, document collection should be systematic and auditable. Case folders must be organized by issue area, with cross-references to source materials, correspondence, and audit trails. Metadata standards enable efficient search and retrieval, supporting later analysis and regulator-facing summaries. Redaction policies must be pre-approved and consistently applied, balancing the public interest with privacy concerns. A centralized repository with access controls helps prevent unauthorized alterations and ensures that every document has a traceable provenance. Periodic audits of the repository reinforce accountability and deter manipulation or loss of essential materials.
Communicating results responsibly and managing outcomes
Aligning the investigation with applicable antitrust statutes requires ongoing legal oversight. Counsel should monitor evolving regulatory guidance and adapt the investigative approach to reflect current enforcement priorities. A risk-based framework can prioritize high-impact hypotheses, ensuring efficient use of scarce resources while not neglecting corroborating evidence in lower-priority areas. Clear decision thresholds help determine when to escalate concerns to senior management or external specialists. Regular status reporting to governance committees maintains transparency and minimizes surprises. A defensible conclusion rests on a coherent narrative supported by consistently collected evidence and a careful consideration of alternative explanations.
After data gathering, analysis becomes the cornerstone of defensible outcomes. Analysts should articulate the factual findings, link them to specific market behaviors, and evaluate whether conduct plausibly constitutes illegality or competitive harm. Explicit sensitivity analyses can illustrate how different assumptions affect conclusions, which strengthens the investigation’s credibility. The final report should present an objective assessment, acknowledge limitations, and clearly distinguish between facts, inferences, and conclusions. By foregrounding methodological rigor, organizations reduce the risk that post hoc interpretations undermine the integrity of the process.
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Lessons learned and sustaining a culture of compliance
Once conclusions are reached, communications strategies must balance transparency with privilege and confidentiality. Internal reports should be tailored to stakeholders, with executive summaries that focus on material findings, corrective actions, and governance reforms. External disclosures, if any, should be coordinated with counsel to avoid waivers of privilege, inadvertent admissions, or misinterpretations. A remediation plan anchored in root-cause analysis demonstrates accountability and supports future compliance. Governance bodies may require action plans, training programs, or revised policies designed to prevent recurrence. Documented timelines and measurable milestones ensure that improvements are trackable and auditable over time.
In parallel, organizations should prepare for potential regulatory scrutiny or civil actions. Anticipating regulators’ questions helps structure responses proactively and reduces the chance of miscommunication. A privilege-informed disclosure strategy involves preparing materials that regulators can review without exposing sensitive legal strategies. Scenario planning, including best-case and worst-case trajectories, helps management allocate resources, respond to inquiries, and adjust governance controls. A well-managed communications regime reinforces the organization’s commitment to lawful competition and demonstrates seriousness about remedy and reform.
An effective internal investigation generates not only facts but institutional learning. Post-incident reviews should identify gaps in policies, training, or controls that allowed the issue to arise. The organization can then implement targeted improvements, such as enhanced surveillance of market activity, stronger procurement practices, or clearer whistleblower channels. Importantly, lessons learned must inform ongoing policies and be integrated into annual risk assessments. By closing feedback loops, a company demonstrates its dedication to building a culture of proactive compliance rather than reactive remediation.
Finally, leadership must endorse ongoing governance and accountability. Sustained tone from the top reinforces the seriousness of antitrust compliance and encourages truthful reporting. Regular audits and independent monitoring provide assurance that new controls operate effectively and that the privilege, preservation, and disclosure practices remain appropriate. A mature program treats investigations as catalysts for better risk management, not as punitive exercises. When robust structures exist, organizations are better positioned to deter improper conduct, defend their decisions, and navigate complex enforcement landscapes with integrity and confidence.
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