What is the difference between perjury and false statements?
One requires an oath. The other only requires a federal agent and a sentence that is not true. Understanding which statute you are up against - 18 U.S.C. § 1621, § 1623, or § 1001 - is the first move of the defense.
Two statutes, two traps.
Perjury - 18 U.S.C. § 1621 and § 1623 - is lying under oath: in court, before a grand jury, in a deposition, or in a signed declaration. The government must prove the statement was false, that you knew it, and that it was material to the proceeding. It carries up to five years.
False statements - 18 U.S.C. § 1001 - needs no oath at all. Any knowingly false, material statement made in a matter within federal jurisdiction qualifies: an interview with FBI agents at your kitchen table, a form filed with an agency, an email to a regulator. Also five years - eight if terrorism is involved. It is the most quietly dangerous statute in the federal code.
Why § 1001 is the one to fear.
Nobody walks into a grand jury by accident. But people talk to federal agents by accident every day - at the door, at the office, on a "routine" call. There is no oath, often no warning, and no recording requirement: the agents’ memo of the interview, the 302, becomes the official version of what you said.
That is how a case about something else becomes a case about you. Ask Martha Stewart - the government never charged the stock trade. It charged the interview about the trade. The cover-up statute is the conviction statute, and prosecutors reach for it precisely because it is easy to prove and hard to take back.
Materiality, willfulness, and the literal truth.
Both crimes require more than a wrong answer. The statement must be material - capable of influencing the decision at hand - and willful: a knowing lie, not a failed memory, a mistake, or an answer to a question you understood differently than the agent meant it.
The Supreme Court’s Bronston decision adds the defense the government hates: a literally true answer cannot be perjury, even if it misleads. Much of this defense work is forensic linguistics - reconstructing the exact question, the exact answer, and the ambiguity between them.
What to do in the first week.
Do not schedule a second interview to "clarify" - that is how one count becomes two. Counsel engages first: we find out what the government thinks you said, preserve every document that shows what you knew and when, and - where § 1623(d)’s narrow recantation window applies - use it before it closes.
From there the defense runs on the elements: the question was ambiguous, the answer was literally true, the statement was not material, the memory was honest. This firm has defended obstruction and false-statement cases nationwide - the earlier we start, the more of the record we get to write.

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