Federal Motion to Revoke or Amend Detention (Bond)

What a Motion to Revoke or Amend Detention Is

When a person is arrested on a federal charge, a magistrate judge holds an initial hearing and decides whether to release the person, release the person on conditions, or order the person held in custody until trial. A Motion to Revoke or Amend Detention is the tool a defendant uses to challenge a detention order after the magistrate judge has entered it. It asks the United States District Court, the court with original jurisdiction over the offense, to set the order aside and order release, or to amend the conditions the magistrate judge imposed.

The motion lives inside the Bail Reform Act of 1984, codified at 18 U.S.C. § 3142. That statute builds in a strong preference for pretrial release and treats jailing a defendant before trial as the exception rather than the rule. Its companion, 18 U.S.C. § 3145, gives a person who has been ordered detained the right to move the district judge to revoke or amend the magistrate judge's ruling. In United States v. Salerno, 481 U.S. 739 (1987), the Supreme Court described pretrial liberty as the norm and pretrial detention as a carefully limited exception.

Two points matter at the outset. First, the motion is not a simple appeal in which the district judge looks only for clear error; as explained below, the district court reviews the detention question anew. Second, the same statute lets the government move to revoke a magistrate judge's release order, so the mechanism runs in both directions. This page addresses the defense side: a defendant who has been detained and wants release or different conditions.

The Bail Reform Act Framework

Section 3142 sorts every charged defendant toward one of four outcomes: release on personal recognizance or an unsecured bond, release on conditions, temporary detention, or pretrial detention. The judicial officer must choose the least restrictive option that will reasonably assure two things: the defendant's appearance in court and the safety of any other person and the community. Detention is authorized only when the court finds that no condition or combination of conditions can reasonably assure those interests.

The constitutional footing for that scheme comes from Salerno. The Supreme Court rejected a facial due-process and Excessive Bail Clause attack on the Act and held that the government's regulatory interest in community safety can, in appropriate circumstances, outweigh an individual's liberty interest. The Court stressed that the Act is narrow: it reaches defendants charged with the most serious offenses, it requires a hearing with counsel, and it demands clear and convincing evidence before a court may detain a person as a danger to the community.

That framework traces back to older bail principles. In Stack v. Boyle, 342 U.S. 1 (1951), the Supreme Court held that bail set higher than an amount reasonably calculated to assure the accused's presence at trial is excessive under the Eighth Amendment, and that the right to release before conviction lets a defendant prepare a defense and avoids punishment before a finding of guilt. The Bail Reform Act carried those ideas forward while adding a structured, factor-driven process for the narrow set of cases in which detention may be considered.

The Section 3142(g) Factors

When a court weighs release against detention, 18 U.S.C. § 3142(g) lists the factors it must consider. These same factors frame a Motion to Revoke or Amend Detention, because the district judge applies them independently. A well-supported motion walks through each factor and shows why conditions can manage any risk the government raises.

No single factor is decisive. A defendant with deep local ties, steady employment, and a history of appearing in court presents a very different picture from one with a record of flight or violence. The motion's job is to marshal concrete facts under each heading, then propose a conditions package, such as a third-party custodian, location monitoring, surrender of passports, or regular reporting, that answers the specific risks the government identifies.

The Rebuttable Presumptions Under Section 3142(e)

In certain categories of cases, 18 U.S.C. § 3142(e)(3) creates a rebuttable presumption that no condition or combination of conditions will reasonably assure the defendant's appearance and the safety of the community. The presumption commonly arises where there is probable cause to believe the defendant committed a drug offense carrying a maximum term of ten years or more, an offense under 18 U.S.C. § 924(c) involving a firearm, certain terrorism offenses, or offenses involving a minor victim.

Understanding how the presumption operates is central to a Motion to Revoke or Amend Detention. In United States v. Rueben, 974 F.2d 580 (5th Cir. 1992), the Fifth Circuit explained that the presumption shifts to the defendant only the burden of producing rebutting evidence, not the burden of persuasion, which stays with the government. In practical terms, the defendant must come forward with some evidence, for example about community ties or the absence of any prior record, that release conditions can work.

Producing that evidence does not make the presumption vanish. The Rueben court noted that even after a defendant offers rebutting evidence, the court may still weigh Congress's judgment that certain offenders pose a special risk of flight and danger. The court also cautioned that community ties bound up with the alleged offense carry little weight; family, a home, or a job that exists because of the charged conduct does not show a genuine anchor to the community. A strong motion therefore offers independent, verifiable ties that stand apart from the accusation.

Evidentiary Standards at a Detention Hearing

The burden of proof at a detention hearing depends on which ground for detention the government presses. The distinction matters because a Motion to Revoke or Amend Detention often argues that the government failed to meet the correct standard.

The Fifth Circuit set out that split in United States v. Fortna, 769 F.2d 243 (5th Cir. 1985). The court read Section 3142(f) to require clear and convincing evidence for a finding that no conditions will assure community safety, while the flight determination is governed by the ordinary preponderance standard. The court also held that the lack of reasonable assurance of either the defendant's appearance or the safety of the community is enough to support detention; the government need not prove both.

Detention hearings are also less formal than trials. As Fortna noted, the rules of evidence do not apply, so a judicial officer may consider reliable hearsay, and the parties often proceed by proffer rather than live testimony. That flexibility cuts both ways: the defense can present letters, records, and representations of counsel, while the government can rely on agents' summaries and investigative reports. A Motion to Revoke or Amend Detention frequently attacks the reliability of the government's proffer and supplies a fuller, documented record for the district judge to weigh anew.

Section 3145(b) Review: The De Novo Standard

The heart of the motion is the standard of review. Under 18 U.S.C. § 3145(b), a person ordered detained by a magistrate judge may file, with the court having original jurisdiction over the offense, a motion for revocation or amendment of the order. The district judge does not simply check the magistrate judge's work for error.

In United States v. Fortna, 769 F.2d 243 (5th Cir. 1985), the Fifth Circuit held that when the district court acts on a Section 3145(b) motion to revoke or amend a magistrate's pretrial detention order, the court acts de novo and makes an independent determination of the proper pretrial detention or conditions for release. The district judge may review the record made before the magistrate judge, may take additional evidence, and may reach a different conclusion. The court restated the same rule in United States v. Rueben, 974 F.2d 580 (5th Cir. 1992).

De novo review is a meaningful feature for the defense. It means the district judge is not bound by the magistrate judge's findings and can be persuaded by a stronger evidentiary showing, a more detailed release plan, or an argument that the magistrate applied the wrong standard or leaned too heavily on the charge itself. It also means the quality of the written motion and the supporting materials matters a great deal, because the district judge is deciding the detention question in the first instance rather than looking for an abuse of discretion. On a later appeal to the court of appeals, by contrast, review of the district court's own decision is deferential.

When and Why the Motion Is Filed, and Timing

The motion follows the initial detention hearing. Under Section 3142(f), that hearing usually happens at the defendant's first appearance, though either side may seek a short continuance, generally up to three days for the government or up to five days for the defense. If the magistrate judge orders detention, the defense can promptly file a Section 3145(b) motion asking the district judge to revoke or amend the order. Section 3145 directs that the motion be determined promptly.

Timing is a strategic choice. Some defense lawyers file quickly to get their client before a district judge without delay. Others wait until they can assemble a stronger package, such as a concrete third-party custodian, proof of employment, medical records, or a treatment placement, because de novo review rewards a fuller record. No fixed deadline forfeits the right, but a defendant remains in custody while the motion is pending, so speed and thoroughness must be balanced.

Section 3142(f) also allows a detention hearing to be reopened, before or after a detention order, if information exists that was not known to the defendant at the time of the hearing and that has a material bearing on release. Changed circumstances, a co-defendant's release on comparable facts, a new custodian, a health crisis, or the government's decision to drop the most serious count, can justify reopening even when an earlier request failed. A Motion to Revoke or Amend Detention and a motion to reopen are distinct paths a defense team may use together.

The Remedy and Where This Motion Fits

If the motion is granted, the remedy is release under the least restrictive conditions that will reasonably assure appearance and community safety. Section 3142(c) supplies the conditions a court can impose, which commonly include:

• placement with a third-party custodian;
• restrictions on travel, residence, and contact with witnesses or co-defendants;
• location or electronic monitoring and curfews;
• surrender of firearms and passports;
• drug testing or participation in treatment; and
• a secured or unsecured appearance bond.

The district judge may adopt the magistrate judge's conditions, craft new ones, or, when the government is the moving party, order detention that the magistrate judge declined to impose. If the district judge also orders detention, the next step is an appeal to the court of appeals under Section 3145(c), reviewed under a deferential standard. Detention orders are among the limited pretrial rulings a defendant may challenge on appeal before trial.

Within a federal defense, this motion sits alongside the initial detention hearing, motions to reopen detention, and, after any conviction, the separate question of release pending sentencing or appeal under 18 U.S.C. § 3143. It is one of the earliest and most consequential fights in a federal case, because whether a client is free or detained shapes the client's ability to help prepare the defense, keep a job, and hold a family together while the case proceeds. Anyone facing federal detention should consult a licensed attorney about the specific facts of the case; this page is general information, not legal advice.

Common Situations & Variations

This motion comes up in several recurring situations. Each guide below walks through a specific fact pattern, the governing standard, and how Federal courts have handled it.

What the Case Law Says

These decisions—verified against primary sources—control how this motion is litigated. Every case still turns on its own facts.

• United States v. Salerno, 481 U.S. 739 (1987) — The Bail Reform Act's pretrial detention provisions are facially constitutional; detention for dangerousness requires clear and convincing evidence.
• Stack v. Boyle, 342 U.S. 1 (1951) — Bail set higher than an amount reasonably calculated to assure the accused's presence at trial is excessive under the Eighth Amendment.
• United States v. Fortna, 769 F.2d 243 (5th Cir. 1985) — On a Section 3145(b) motion to revoke or amend a magistrate's detention order, the district court acts de novo and determines detention independently.
• United States v. Rueben, 974 F.2d 580 (5th Cir. 1992) — The Section 3142(e) presumption shifts only the burden of production to the defendant; the burden of persuasion stays with the government.

General summaries of published opinions for information only — not predictions about any specific case.