Section 3145(b) Review: Asking the District Judge to Revoke a Detention Order

What Section 3145(b) Review Is and Who Decides It

Section 3145(b) review is the Bail Reform Act’s built-in second look at a detention order. It is not an appeal to the Fifth Circuit, and it is not a request that the magistrate judge reconsider. It is a motion filed in the district court itself, asking the Article III judge assigned to the case to revoke or amend the detention order the magistrate judge entered after the hearing.

The statute is short. If a person is ordered detained by a magistrate judge, the person may file, with the court having original jurisdiction over the offense, a motion for revocation or amendment of the order, and the motion “shall be determined promptly.” See 18 U.S.C. § 3145(b). The “court having original jurisdiction” is the district where the charge is actually pending, which matters when a defendant is arrested in one district on a case filed in another. In United States v. Cisneros, the Tenth Circuit explained that a Section 3145 motion should be considered and ruled on in the first instance by a district judge in the court of original jurisdiction; one magistrate judge does not sit in review of another magistrate judge’s order.

The same section cuts both ways. Under Section 3145(a)(1), when a magistrate judge orders release, the government may ask the district judge to revoke or amend that release order, and the standard is the same fresh look. Detention litigation therefore often continues past the first hearing no matter who prevailed at it, and a defense team should treat the district-judge round as a planned stage of the case rather than a filing of last resort.

There is no fixed statutory deadline for filing, but the motion is a pretrial remedy and its value shrinks as trial approaches. The motion itself should read like a complete release application: the procedural history, the specific findings being challenged, the proposed conditions, and the exhibits that support them. Filing promptly and completely also starts the court’s own promptness obligation, discussed below, working in the defendant’s favor as early as possible.

De Novo Means the District Judge Starts Fresh

De novo review means the district judge starts fresh. In United States v. Fortna, the Fifth Circuit held that when the district court acts on a Section 3145(b) motion, it acts de novo and makes an independent determination of the proper pretrial detention or conditions for release. The district judge owes the magistrate judge’s decision no deference, and the rule applies whether the defendant is challenging a detention order or the government is challenging a release order.

The Ninth Circuit’s decision in United States v. Koenig spells out what that independence requires. The district court there thought it could set aside the magistrate judge’s findings only if they were clearly erroneous. That was error: the district judge must review the evidence and make an independent determination whether the findings are correct, with no deference, and the ultimate decision on detention is likewise made without deference to the magistrate judge’s conclusion. A district judge who merely checks the first order for obvious mistakes has applied the wrong standard.

Independence runs in both directions. Fortna confirms that a district court, making its own determination, can order detention even though the magistrate judge refused to — so a defendant who won release cannot assume the district judge will simply adopt it when the government moves under Section 3145(a). For the detained defendant, though, the practical meaning is straightforward: the arguments, witnesses, and conditions that did not persuade the magistrate judge get a genuinely new audience, not an error-correction review. The district judge weighs the same Section 3142(g) factors — the nature and circumstances of the offense, the weight of the evidence, the defendant’s history and characteristics, and the nature of any danger release would pose — and reaches whatever conclusion that judge independently believes the record supports, including a conclusion opposite to the one reached below on the identical record.

Record Review, New Evidence, or a New Hearing?

De novo does not mean starting over from scratch in every case. Koenig makes both halves of the rule explicit: the district court is not required to redo the detention hearing or proceed as if the magistrate judge’s findings did not exist, but if deciding the motion makes it necessary or desirable to hold an additional evidentiary hearing, the court may do so — and its power to take evidence is not limited to material that was never presented to the magistrate judge.

Fortna describes the same flexibility from the district court’s side: the judge may rest on an independent review of the record made before the magistrate judge, may hear additional evidence, and may support the outcome with the court’s own additional findings. In practice, many Section 3145(b) motions are decided on the transcript, the pretrial services report, and the parties’ written proffers, with a live hearing reserved for cases where something genuinely needs developing — a custodian the judge wants to hear from, a factual dispute the paper record cannot resolve, or a changed condition package worth testing through testimony.

That allocation puts a premium on what the defense adds to the record. A motion that simply re-argues the same hearing rarely moves a district judge who has just read that hearing’s transcript. The more persuasive approach is to fix what was thin the first time: a concrete third-party custodian with a sworn statement, verified employment and residence, a treatment placement with an admission date, a specific electronic-monitoring and travel-surrender package, and documentation aimed squarely at whatever finding actually drove the detention order. Because review is de novo, nothing limits the new material to facts unavailable earlier — unlike a motion to reopen before the magistrate judge, discussed next — so the district-court round is the natural place to present the release application the first hearing should have had. Expect the government to supplement as well; the fresh look is available to both sides.

No New-Information Requirement, Unlike Reopening

Section 3145(b) review is often confused with reopening the detention hearing under Section 3142(f), but the two mechanisms have different gatekeeping rules. Reopening requires information that was not known to the movant at the time of the hearing and that has a material bearing on release. Review does not. As Cisneros put it, unlike Section 3142(f), Section 3145 does not require that new information be available before a detention order can be reconsidered and revoked.

That difference decides strategy. A defendant whose most persuasive material existed at the time of the hearing — but was not presented well, or at all — generally cannot reopen before the magistrate judge, because previously available information is not “new.” The same defendant can seek Section 3145(b) review, where the district judge takes a fresh look and may receive additional evidence without any newness screen. Conversely, when something genuinely new arises months after the district judge has already ruled, a targeted motion to reopen before the judicial officer who heard detention may be the more direct tool.

The mechanisms are not mutually exclusive, and counsel frequently sequence them: a prompt Section 3145(b) motion after the initial order, a motion to reopen if a significant event later changes the picture, and condition-amendment requests as circumstances evolve on release.

The Motion Shall Be Determined Promptly

Congress put a clock on review: the statute directs that the motion “shall be determined promptly.” The Bail Reform Act does not define promptness in days, and the Fifth Circuit has not fixed an outer limit, but the requirement has teeth. Every week a review motion sits undecided is a week of pretrial custody that no later ruling can refund, and Congress wrote the promptness command with exactly that arithmetic in mind.

In United States v. Fernandez-Alfonso, the Ninth Circuit held that a thirty-day gap between the defendant’s motion for review and the district court’s resolution — a delay caused by court oversight rather than by either party — violated Section 3145(b)’s promptness requirement. The court refused to graft a prejudice requirement onto the statute, reasoning that demanding proof of prejudice would effectively erase the promptness command, and it ordered release on conditions under Section 3142(c) rather than unconditional release. The decision is persuasive rather than binding in this circuit, but its logic tracks the statute’s purpose: review must be speedy to prevent unnecessary incarceration on the basis of an incorrect first-level decision.

For the defense, promptness is both a shield and a scheduling tool. File the motion quickly and completely; ask for an expedited briefing schedule or submission on the papers; and if weeks pass without action, a respectful status motion invoking the promptness command is appropriate. Delay harms only the client sitting in pretrial custody, and the statute places the obligation to move fast on the court — a point worth making politely, on the record, and early.

If the District Judge Says No: Appeal to the Fifth Circuit

If the district judge denies the motion, the detention order becomes appealable. Section 3145(c) provides that an appeal from a detention order is governed by the ordinary appellate-jurisdiction statute, 28 U.S.C. § 1291, and the court of appeals decides it on the record the district court made.

The standard changes at that step, and it changes against the appellant. In United States v. Rueben, the Fifth Circuit stated the rule it still applies: absent an error of law, the court must uphold a district court’s detention order if it is supported by the proceedings below, a deferential standard the court equates to abuse of discretion. On appeal the question is whether the evidence as a whole supports the conclusion reached below — not whether the appellate judges would have released the defendant themselves.

The asymmetry between the two stages drives sound strategy. The district-court round is de novo; the appellate round is deferential. The place to add the custodian affidavit, the employment records, and the concrete condition package is therefore in front of the district judge, where the record is still open and the standard is still fresh — an appellate panel reviewing for abuse of discretion rarely supplies what the motion below left out. Counsel should also ask the district court for specific written findings, because a reasoned order is what frames any error-of-law argument that survives the deference.

L&L Law Group, PLLC litigates federal detention and Section 3145(b) review motions in the Northern and Eastern Districts of Texas from its Frisco office. Nothing on this page predicts an outcome; each motion turns on the record, the Section 3142(g) factors, and the district judge’s independent judgment.

Where This Fits

This guide is one of four situations that arise under the Motion to Revoke or Amend Detention (Bond). Start with the parent motion for the overall framework, or move to a related fact pattern:

What the Case Law Says

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

• United States v. Fortna, 769 F.2d 243 (5th Cir. 1985) — On a Section 3145(b) motion the district court acts de novo and makes an independent determination of detention or conditions of release.
• United States v. Rueben, 974 F.2d 580 (5th Cir. 1992) — Absent an error of law, appellate courts uphold a detention order supported by the proceedings below, a standard equated to abuse of discretion.
• United States v. Cisneros, 328 F.3d 610 (10th Cir. 2003) — A Section 3145 motion is ruled on by a district judge in the court of original jurisdiction; unlike 3142(f), it requires no new information.
• United States v. Koenig, 912 F.2d 1190 (9th Cir. 1990) — De novo review requires an independent determination without deference, but the district court need not hold a new evidentiary hearing in every case.
• United States v. Fernandez-Alfonso, 813 F.2d 1571 (9th Cir. 1987) — An inadvertent thirty-day delay in deciding a Section 3145(b) review motion violated the statute's requirement that the motion be determined promptly.

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