Analysis

What to do When Under Investigation For Federal Defense Playbook

July 2026 · 6 min read · John D. Kirby, Former Federal Prosecutor

When you learn that you are under federal investigation, it’s a critical moment that requires immediate action to protect your rights and interests. Investigations can begin for various reasons, such as tips from informants, evidence gathered during unrelated investigations, or proactive surveillance by law enforcement agencies like the FBI, DEA, IRS, or Homeland Security.

Upon learning of an investigation, it’s crucial to understand that federal agencies are equipped with extensive resources and legal tools. They may use grand jury subpoenas, search warrants, or informal inquiries to gather information. The initial steps you take in these first 48 hours can set the tone for the entire process.

The most critical step is to retain experienced federal criminal defense counsel immediately. Early legal advice is invaluable as your lawyer can guide you through document preservation and avoid self-incrimination. They can also assist with any immediate deadlines or requests from investigators, such as production of documents.

There are several things NOT to do when under investigation:

Avoid making statements to law enforcement without counsel present. Any information you provide could be used against you in court and may not serve your best interests.

Do not destroy or alter documents or electronic communications related to the investigation, as this can escalate charges and undermine your credibility.

In terms of document preservation, ensure that all relevant emails, texts, business records, financial statements, and any other pertinent documents are preserved. Your lawyer will advise you on what is necessary for a robust legal defense.

Early Counsel’s Role

Your attorney will work to understand the nature and scope of the investigation and identify potential defenses early on. They may also seek information through pretrial motions, including discovery requests and suppression hearings if evidence was obtained illegally or improperly.

Jury selection is another critical area where early legal guidance pays off. Your lawyer can help craft voir dire questions that uncover biases in potential jurors and ensure a fair trial process.

Throughout the case, your defense team will employ strategic cross-examination techniques to challenge prosecution witnesses’ credibility and undermine their testimony. Opening statements and closing arguments will be crafted to present your side of the story clearly and persuasively to the jury.

In conclusion, immediate action is key when under federal investigation. Engaging an experienced attorney early can significantly impact the course and outcome of a case by protecting your rights, preserving evidence, and setting up a strong defense strategy.

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