A USM hold is a written request from the United States Marshals Service asking a jail to keep someone in custody until federal authorities can take over. It is also called a federal detainer. The practical meaning for the person in the cell is simple and hard: even if a state judge would grant bail on the local charges, the hold blocks release, because the facility has been asked in writing to keep holding them for the feds.
If a family member just found out a USM hold has been lodged, it means the federal government has an interest in that person — pending federal charges, a warrant, a supervised release violation, or, less often, a role as a material witness. The hold starts a sequence of federal court proceedings with their own rules, and those rules, not the state case, will now drive most of what happens.
A Hold Is Not the Same as a Warrant
People often mix these two up. A warrant directs law enforcement to find and arrest someone. A hold is filed with the facility that already has the person in custody, asking that facility to keep holding them until the Marshals can pick them up. The Bureau of Prisons defines a detainer as a formal request from a federal, state, or local jurisdiction for custody of someone upon completion of their current term or resolution of their current charges.1Federal Bureau of Prisons. Program Statement 5800.15 – Detainers
Once the USMS files a federal detainer, a separate warrant is not required to keep the person in the jail.1Federal Bureau of Prisons. Program Statement 5800.15 – Detainers The hold alone is enough. That is why people arrested on state charges sometimes cannot bond out even after posting: a federal detainer they did not know existed has been lodged against them.
Why the Hold Was Placed
The most common reason is a federal arrest warrant. When a federal grand jury returns an indictment, or a federal magistrate approves a criminal complaint on offenses like drug trafficking, fraud, or firearms charges, the Marshals are responsible for locating and detaining the defendant. If that person is already sitting in a state or county jail on unrelated charges, the Marshals lodge a hold rather than physically taking custody right away.
A violation of federal supervised release is another common trigger. After a federal prison sentence, most people spend a period on supervised release with conditions like check-ins, travel restrictions, or drug testing. Breaking those conditions can prompt a judge to issue a warrant, and the Marshals will place a hold if local police pick the person up.
Less often, a hold applies to a material witness. Federal law lets a judge order someone’s arrest if their testimony is important to a criminal case and a subpoena alone seems impractical.2Office of the Law Revision Counsel. 18 USC 3144 – Release or Detention of a Material Witness A material witness cannot be held indefinitely if their testimony can be preserved through a deposition, and the hold must end once the need for live testimony passes.
What Happens After the Hold Is Placed
The first federal step is the initial appearance before a federal magistrate judge. Federal rules require that anyone arrested be brought before a judge “without unnecessary delay.”3Cornell Law School. Federal Rules of Criminal Procedure Rule 5 – Initial Appearance In practice that usually means within 48 hours, though a hold in a distant county jail can slow things down because the person has to be transported.
At the initial appearance, the judge explains the charges, advises the defendant of their rights, and addresses legal representation. If the defendant cannot afford an attorney, the court appoints one at no cost. The judge also decides whether to detain the person pending trial or set conditions for release.
If the arrest happens in a different federal district from where the charges were filed, a separate proceeding under Federal Rule of Criminal Procedure 40 takes place. The magistrate in the arrest district conducts an initial appearance and then arranges transfer to the charging district. That judge can also modify any earlier release or detention order, but must put the reasons in writing.4Office of the Law Revision Counsel. Federal Rules of Criminal Procedure Rule 40
Your Rights While the Hold Is in Place
A USM hold does not strip away constitutional protections. The Fifth Amendment’s due process guarantee means you cannot be locked up without proper legal procedures, including notice of the charges and a fair hearing. The Sixth Amendment gives you the right to counsel in any federal prosecution, appointed if you cannot pay.
The Eighth Amendment prohibits excessive bail, but that is not the same as a right to bail. Federal law allows a judge to order pretrial detention without bail if the defendant is a serious flight risk or a danger to the community. This is decided at a detention hearing, with arguments from both sides. The judge weighs the nature of the charges, the strength of the evidence, community ties, employment history, criminal record, and whether the person was already on release for another offense at the time of arrest.5Office of the Law Revision Counsel. 18 USC 3142 – Release or Detention of a Defendant Pending Trial
If the judge grants release, expect conditions rather than a cash bond. Electronic monitoring, surrender of passports, curfews, and regular check-ins with pretrial services are common. The federal system leans on these non-monetary conditions more heavily than most state systems do. If the judge orders detention, the defendant stays in custody for the duration of the case, which can be many months.
When State and Federal Cases Overlap
A USM hold often shows up when someone faces charges in both state and federal court. Who gets custody first is governed by the doctrine of primary jurisdiction: whichever sovereign arrested the person first generally has priority to try, sentence, and incarcerate them before the other sovereign gets its turn.6Bureau of Prisons. Interaction of Federal and State Sentences If local police arrested you and the feds placed a hold afterward, the state typically keeps primary jurisdiction.
Primary jurisdiction only shifts when the first sovereign gives it up, by releasing on bail, dismissing charges, granting parole, or completing the sentence. Until then, the federal case moves along procedurally but the person remains state property, so to speak.
When the federal government needs the defendant in federal court while the state still has primary jurisdiction, it uses a writ of habeas corpus ad prosequendum, a court order that temporarily borrows the prisoner from the state.7U.S. Marshals Service. Writ of Habeas Corpus Production under this writ does not transfer primary jurisdiction to the feds. Once the federal proceedings finish, the Marshals return the defendant to state custody.6Bureau of Prisons. Interaction of Federal and State Sentences That distinction matters for how time served gets counted, which is the next problem.
Does Jail Time Under the Hold Count
One of the most frustrating parts of a USM hold is figuring out whether the time spent sitting in a local jail actually reduces a federal sentence. Federal law says a defendant gets credit for any time in official detention before the sentence begins, as long as that time resulted from the offense being sentenced and has not already been credited against another sentence.8Office of the Law Revision Counsel. 18 USC 3585 – Calculation of a Term of Imprisonment
The phrase “has not already been credited against another sentence” is where people get caught. If someone sits in county jail for six months under both a state case and a USM hold, and the state court gives credit for that time on the state sentence, the federal system will not credit the same six months toward the federal sentence. Federal law prohibits double counting.8Office of the Law Revision Counsel. 18 USC 3585 – Calculation of a Term of Imprisonment Many people assume that because they were held on a federal detainer, all that jail time will shorten the federal sentence. Often the state has already claimed it.
The Bureau of Prisons, not the sentencing judge, makes the final calculation of credit for time served. A defendant who believes the calculation is wrong can challenge it, but the better move is to raise the credit issue with defense counsel early, especially when dual state and federal charges are pending.
How a USM Hold Gets Lifted
A hold ends in a handful of ways. The most common is a judicial decision at a detention hearing. The judge applies the federal detention factors and either orders continued detention or sets release conditions.5Office of the Law Revision Counsel. 18 USC 3142 – Release or Detention of a Defendant Pending Trial If the judge grants release, the hold is lifted and conditions like GPS monitoring or home confinement take over.
The hold also ends if the underlying federal charges are dismissed, if the case resolves by plea, or if the federal sentence is completed. For material witnesses, the hold must be lifted once the testimony is secured or the proceeding concludes.
Speed matters. If the Marshals have placed a hold but have not yet transported the person for an initial appearance, defense counsel can push the process by contacting the duty magistrate and the assigned U.S. Attorney, or by seeking a writ to compel production before a judge. The longer someone sits in a county jail under an unresolved hold, the harder it becomes to mount an effective defense.