Corporate Crime · 2026-07-10 · By John D. Kirby

Corporate Internal Investigations: When and How to Conduct One

internal investigation coverage from former federal prosecutor John D. Kirby — practical analysis for executives and practitioners.

Federal courthouse — Southern District of California

Introduction

How Corporate Prosecutions Work

Practical Considerations

Conclusion

The conduct of corporate internal investigations is a critical aspect of legal compliance and risk management that affects not only corporations but also their employees, shareholders, customers, and even competitors. A well-executed investigation can salvage a company's reputation, prevent regulatory penalties, and mitigate potential criminal charges. Conversely, mishandling an internal probe can lead to severe financial consequences, reputational damage, and legal ramifications for the company and its leadership.

Under U.S. law, companies are increasingly expected to conduct thorough investigations upon discovering credible allegations of misconduct or non-compliance with regulations such as the Foreign Corrupt Practices Act (FCPA) and Sarbanes-Oxley Act (SOX). The Department of Justice's (DOJ) enforcement approach emphasizes a company’s willingness to voluntarily disclose issues, cooperate fully, and implement effective compliance programs. This framework underscores the importance of prompt and comprehensive internal investigations when potential violations are identified.

Practically speaking, companies must navigate several stages during an investigation to ensure it is both legally defensible and thorough. These include identifying the scope of the inquiry, securing necessary documents and electronic data, interviewing relevant individuals, and analyzing findings. Legal counsel plays a crucial role in guiding these steps, ensuring that attorney-client privilege and work-product protections are maintained throughout. Additionally, investigators must be adept at distinguishing between credible allegations and mere speculation to avoid unnecessary actions.

For any individual or entity facing an internal investigation, the immediate priority should be engaging experienced legal representation. Counsel can provide guidance on rights, responsibilities, and potential outcomes while advocating for a fair process. It is imperative not to destroy evidence, lie under oath, or engage in misconduct that could exacerbate the situation. Cooperation with the investigation, within the bounds of legal advice, often proves beneficial in achieving favorable resolutions.

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