Misprision Of A Felony Meaning

Misprision of a felony under 18 U.S.C. section 4 is the federal offense of knowingly concealing a completed federal felony and failing to make it known to the specified federal authorities as soon as possible. Mere silence or failure to report, without an affirmative act of concealment, is not enough for this offense.

The distinction matters to a witness, employee or relative trying to understand whether doing nothing and actively hiding a crime are legally the same. They are not. The analysis separates what crime occurred, what the person knew, what the person did to conceal it and whether the required notification occurred.

Section 4 authorizes a fine, imprisonment up to three years, or both. Its maximum places it in the federal Felony category under section 3559. The three-year figure is a statutory maximum, not the sentence every convicted person receives.

Separate the four core elements

Courts commonly explain the offense through these four elements, illustrated in United States v. Brantley, Eleventh Circuit, October 9, 2015:

1. A principal committed and completed the alleged felony. Section 4 concerns a felony cognizable in a United States court, not simply conduct the observer dislikes or an unverified suspicion of wrongdoing.
2. The defendant had full knowledge of that fact. Identify the conduct actually known and the evidence supporting that knowledge. Hearsay, an uncertain suspicion and established knowledge should not be treated as interchangeable.
3. The defendant failed to notify the authorities as required. The statute identifies a judge or another person in civil or military authority under the United States and uses the timing requirement “as soon as possible.”
4. The defendant took affirmative steps to conceal the crime. This added conduct is essential; it cannot be replaced by the same bare failure to report already addressed in the third element.

The government must prove the required elements beyond a reasonable doubt. The precise instructions and knowledge requirements must also be checked in the governing circuit.

For example, United States v. Olson, Ninth Circuit, May 15, 2017, requires knowledge of the facts constituting the underlying offense and knowledge that its potential punishment exceeds one year. The person need not know the exact maximum term. A simplified four-item list should not erase that circuit's additional explanation of knowledge.

Distinguish silence from concealment using the actual conduct

These hypothetical comparisons illustrate the questions, rather than guarantee a charging decision:

Knowledge without an added act: Someone learns that a completed federal felony occurred but neither reports it nor takes any affirmative step to hide it. The missing concealment act prevents treating that bare silence as a complete section 4 offense. Separate reporting duties, subpoenas or other applicable laws still require their own analysis.

Knowledge plus evidence-hiding: Someone who knows about the completed felony deliberately moves and hides evidence to keep investigators from discovering it, and fails to make the required notification. That added act raises the concealment issue. The prosecution would still have to establish the other elements and the required mental state.

Uncertain information: Someone hears an unexplained workplace rumor and keeps an ordinary document in its usual location. Do not jump from the existence of a document or rumor to full knowledge and deliberate concealment. Ask what information the person actually possessed and what action, if any, was designed to hide the crime.

Brantley illustrates why the whole record matters. The majority upheld the conviction based on evidence that included hiding a car connected to the underlying federal firearm offense and communications coordinating concealment. It did not establish that any conversation with an offender or every unanswered police question automatically constitutes misprision.

The notification requirement also has a specific recipient. Telling a private manager is not, by itself, the notification to federal authority described in section 4. Nor does the statute create a universal number of hours within which every situation must be reported. Its timing language must be applied to the circumstances and governing law.

A modern case shows why later paperwork does not erase the felony

In United States v. Sullivan, the Ninth Circuit affirmed misprision and obstruction convictions arising from concealment of an Uber data breach. The amended appellate opinion, dated November 12, 2025, is retained among the Supreme Court docket's lower-court materials.

For the misprision charge, the court required proof of a completed underlying felony and the defendant's knowledge. It rejected the claim that a later nondisclosure agreement retroactively authorized the hackers' previously unauthorized access. It also applied Olson's requirement that the defendant know the conduct was punishable by more than a year in prison.

The lesson is narrower than “all bug bounty payments are crimes.” The court expressly did not decide whether a program could provide qualified researchers with authorization before access. Its reasoning addressed the actual access, later agreement and evidence of knowledge in that case.

The Supreme Court docket for No. 25-1082 records denial of review on June 29, 2026. That denial is not a Supreme Court merits ruling adopting every part of the appellate reasoning.

Brantley described misprision as infrequently charged in 2015. The distinct requirements help explain why section 4 should not be read as a generic offense covering every unreported crime: the analysis needs a completed federal felony, the relevant knowledge, nonnotification and affirmative concealment. Sullivan demonstrates that the offense remains operational. Those cases do not supply a current nationwide charging-frequency or plea-bargaining statistic.

Related offenses have different elements

Section 3, section 1519 and section 371 supply the respective statutory requirements. Section 1519 is one obstruction statute, not a definition covering every obstruction offense. Likewise, section 371's overt-act requirement should not be assumed to govern every other conspiracy statute.

Participation in committing the underlying crime raises separate principal-liability questions under section 2. Do not add a blanket rule that section 4's four-element formulation requires proof that the person was wholly uninvolved in every aspect of the underlying events.

The Fifth Amendment also needs careful treatment. Brantley rejected the privilege argument presented there because the prosecution involved affirmative concealment, while expressly leaving a silence-only question undecided. It does not establish either universal immunity for hiding evidence or a universal duty to make a self-incriminating statement. A person's own exposure is a reason to obtain legal advice, not to invent an account or destroy records.

Use a factual checklist before drawing a conclusion

1. Identify the completed offense. What alleged federal felony occurred, and what establishes its completion and federal basis?
2. Separate knowledge from suspicion. What did the person know, when did they learn it and which circuit's knowledge standard applies?
3. Identify the added act. What specific conduct allegedly concealed the crime, beyond not reporting it?
4. Check notification and other legal obligations separately. Who was informed, when, and through what process? Assess any applicable state law, reporting requirement, subpoena or self-incrimination concern on its own terms.

This entry addresses federal section 4. It does not establish the content of every state's reporting law or promise that conduct falling outside this offense is lawful under every other statute. It provides general legal information rather than advice about responding to an investigation.