Federal Criminal Defense Motions

How Federal Criminal Motion Practice Works

Federal criminal cases move on a different track than state prosecutions. From the first appearance forward, the case is governed by the Federal Rules of Criminal Procedure, the Federal Rules of Evidence, and the procedural provisions of Title 18 of the U.S. Code. In that system, written motions are the primary tool the defense uses to shape a case long before a jury is chosen — and often the point at which the case is effectively decided.

Most pretrial motions run through Rule 12. Rule 12(b)(1) lets a party raise any defense the court can decide without a trial of the general issue. Rule 12(b)(3) then lists the categories that must be raised before trial when the basis is reasonably available — defects in instituting the prosecution, defects in the indictment or information, motions to suppress evidence, requests to sever under Rule 14, and certain Rule 16 discovery disputes. Because those categories are use-it-or-lose-it, missing the deadline can forfeit an otherwise valid argument. Rule 12(c) directs the district court to set a pretrial-motion deadline, and disciplined calendaring against that date is part of competent federal defense.

A federal motion is litigated on paper first. The defense files a written motion with a supporting memorandum, the government responds, the defense may reply, and the court either rules on the briefs or sets an evidentiary hearing. Magistrate judges often handle the initial appearance, detention, and — by referral — reports and recommendations on motions such as suppression, which the district judge then reviews. Knowing which judge decides what, and when, is part of the strategy.

Geography matters too. Appeals from every federal district court in Texas are heard by the United States Court of Appeals for the Fifth Circuit, so Fifth Circuit precedent controls how a district judge in Texas rules on suppression, severance, expert, and sufficiency questions. North Texas defendants are usually prosecuted in one of two districts: the Northern District of Texas, which includes the Dallas and Fort Worth divisions, or the Eastern District of Texas, which includes the Sherman, Plano, and Tyler divisions. L&L Law Group's Frisco office sits inside that footprint, and the same motion may be framed differently depending on which district and division hears the case.

Federal jury trials are comparatively uncommon; a large share of federal cases resolve by plea or by pretrial ruling. That reality raises the stakes of motion practice. A granted suppression motion can remove evidence a charge depends on, a dismissal motion can end a count entirely, and even a denied motion builds the record an appeal to the Fifth Circuit will rest on. This hub indexes all 30 federal criminal motions covered here, each paired with its governing authority under the Federal Rules of Criminal Procedure, the Federal Rules of Evidence, or Title 18, so you can see which rule or statute drives each request.

All Federal Criminal Motions

Every federal criminal motion in this compendium, grouped by phase. Select any motion for its statutory authority, standard of review, case law, and satellite variants.

Pretrial Motions

Trial Motions

Post-Trial Motions

Pretrial, Trial, and Post-Trial Motions in Federal Court

Federal motions fall into three phases — pretrial, trial, and post-trial — and each has its own rhythm, deadlines, and preservation rules. Understanding where a motion sits in that sequence tells you when it must be filed and what is at stake if it is missed.

Pretrial motions are where most federal litigation happens. Under Rule 12(b)(3), the defense raises suppression of evidence, challenges to the charging instrument, and severance before trial. Common pretrial filings include a motion to suppress physical evidence under Rule 12(b)(3)(C), a motion to dismiss the indictment under Rule 12(b)(3)(B) or 12(b)(2), a motion for a bill of particulars under Rule 7(f), a motion for Rule 16 discovery, a motion to compel Brady and Giglio disclosure, a motion to sever defendants or counts under Rule 14(a), a motion to revoke or amend a detention order under 18 U.S.C. §§ 3142 and 3145, a motion for a competency evaluation under 18 U.S.C. § 4241, a motion to transfer venue under Rule 21, and a motion for return of property under Rule 41(g). A Speedy Trial Act motion to dismiss under 18 U.S.C. § 3162(a)(2) also belongs to this phase.

Trial motions are made as the case is tried. A motion in limine under the Federal Rules of Evidence seeks an advance ruling on what the jury may hear. In the Fifth Circuit, a James hearing under Rule 801(d)(2)(E) may be requested before co-conspirator statements are admitted. A Daubert motion under Rule 702 challenges the reliability of proposed expert testimony. Once the government rests, a Rule 29 motion for judgment of acquittal tests whether the evidence is legally sufficient. And after a government witness testifies on direct examination, the Jencks Act (18 U.S.C. § 3500) and Rule 26.2 govern production of that witness's prior statements.

Post-trial motions follow the verdict. A Rule 29(c) motion renews the request for a judgment of acquittal after the jury returns. A Rule 33 motion asks for a new trial in the interest of justice, including on newly discovered evidence. A Rule 11(d) motion seeks to withdraw a guilty plea before sentencing. And a motion raising the Double Jeopardy Clause can bar reprosecution or multiple punishments for the same offense.

Order matters because federal deadlines are unforgiving. Rule 12(b)(3) motions must generally be filed by the court's Rule 12(c) deadline or risk forfeiture; trial objections and motions must be made and preserved on the record to survive appeal; and post-trial motions carry their own short filing windows. Sequencing these correctly — filing the right motion at the right time and preserving each issue for the Fifth Circuit — is a core part of building a federal defense rather than reacting to the government's case after the evidence is already in front of the jury and the record has closed.

Suppression and Dismissal in Federal Court

Two families of pretrial motion can end a federal case before trial: motions that suppress the government's evidence and motions that dismiss the charge. Both run through Rule 12, and both must generally be filed by the court's pretrial deadline.

Suppression. Rule 12(b)(3)(C) is the vehicle for asking a district court to exclude evidence obtained in violation of the Constitution. A motion to suppress physical evidence attacks a search or seizure under the Fourth Amendment; when a court suppresses primary evidence, the fruit-of-the-poisonous-tree doctrine associated with Wong Sun v. United States and the exclusionary rule of Mapp v. Ohio can reach derivative evidence as well. A motion to suppress statements challenges a confession taken in violation of Miranda v. Arizona or one that was not voluntary under 18 U.S.C. § 3501. A motion to suppress identification targets eyewitness procedures so suggestive they create a substantial likelihood of misidentification, drawing on United States v. Wade, Neil v. Biggers, and Manson v. Brathwaite.

The Franks challenge. Where the government searched under a warrant, the affidavit itself can be attacked. A Franks motion, named for Franks v. Delaware, argues that the affiant included a deliberate or reckless falsehood — or omitted material facts — without which the affidavit would not establish probable cause. Because a warrant carries a presumption of validity, the defense must first make a substantial preliminary showing before the court will hold a Franks hearing; if the false statements are set aside or the omitted facts added and probable cause then fails, suppression can follow.

Wiretap suppression. Electronic surveillance is governed by Title III. Under 18 U.S.C. § 2518(10)(a), an aggrieved person may move to suppress intercepted wire or oral communications, and § 2515 bars their use when the interception was unlawful. Common grounds include the necessity or exhaustion requirement of § 2518(1)(c) and (3)(c) — the showing that ordinary investigative techniques were tried or would not work — along with minimization failures, facial insufficiency of the authorization order, and sealing or inventory defects.

Dismissing the indictment. A motion to dismiss under Rule 12(b)(3)(B) attacks defects in the charging instrument, such as failure to state an offense, duplicity, or multiplicity, while Rule 12(b)(2) reaches jurisdictional defects and the failure to state an offense. Related dismissal motions argue the statute of limitations, a constitutional or statutory-construction defect in the charged offense, selective or vindictive prosecution under United States v. Armstrong and Blackledge v. Perry, outrageous government conduct or entrapment under United States v. Russell, Jacobson v. United States, and Sherman v. United States, or the Double Jeopardy Clause under Abney v. United States.

Grand-jury challenges. The grand jury operates under Rule 6, and its proceedings are secret. A motion to dismiss for grand-jury abuse may allege prosecutorial misconduct — governed by cases such as Bank of Nova Scotia v. United States and United States v. Williams — a breach of grand-jury secrecy under Rule 6(e), or a defect in the composition or selection of the grand jury, and may seek disclosure of grand-jury transcripts. A separate Kastigar motion, arising from Kastigar v. United States and 18 U.S.C. §§ 6002–6003, forces the government to prove that its evidence derives from sources wholly independent of a defendant's compelled, immunized testimony.

Federal Discovery Motions

Federal discovery is narrower than many defendants expect, and it comes from several independent sources. Knowing which motion reaches which category of information is what makes a federal discovery strategy work.

Rule 16. The core discovery rule, Federal Rule of Criminal Procedure 16(a), entitles the defense to the defendant's own oral, written, and recorded statements under Rule 16(a)(1)(A)–(B), the defendant's prior criminal record, documents and tangible objects material to the defense or that the government intends to use, reports of examinations and tests, and a summary of the expert testimony the government will offer under Rule 16(a)(1)(G). Rule 16 also imposes reciprocal obligations on the defense once it requests and receives discovery, and Rule 16(d)(2) gives the court authority to impose sanctions for a discovery violation, from compelled disclosure to exclusion of the undisclosed evidence.

Brady and Giglio. Separate from any rule of procedure, the Due Process Clause requires the government to disclose favorable evidence. Under Brady v. Maryland, the prosecution must turn over exculpatory evidence material to guilt or punishment; under Giglio v. United States, that duty extends to impeachment evidence — cooperation deals, informant payments, and other material that undercuts a government witness. The line of authority including Kyles v. Whitley, United States v. Bagley, and Napue v. Illinois shapes how materiality is measured and when disclosure must occur. The key distinction is source: Rule 16 is a rule-based entitlement that generally depends on a request, while Brady and Giglio impose a constitutional duty that exists whether or not the defense asks and cannot be satisfied by burying favorable evidence.

The Jencks Act. Prior statements of a testifying government witness are governed by the Jencks Act, 18 U.S.C. § 3500, and its procedural counterpart, Rule 26.2. The government need not produce a witness's prior statement until after that witness has testified on direct examination — a timing rule that distinguishes Jencks material from ordinary discovery. What qualifies as a 'statement' is defined by the Act itself and can include a witness's signed or adopted statements and, in some circumstances, an agent's contemporaneous notes. Because production comes so late, the defense often moves for early disclosure to avoid trial interruptions, and Rule 26.2 extends reciprocal production to defense witnesses.

Bill of particulars. When an indictment is technically sufficient but too vague to prepare against, the defense may move for a bill of particulars under Rule 7(f). The motion compels the government to specify the factual basis of the charge — for example, the overt acts, dates, or co-conspirators underlying a conspiracy count — so the defense can prepare, avoid unfair surprise, and plead double jeopardy against a later prosecution. A bill of particulars is not a discovery device and does not substitute for Rule 16; courts distinguish the two, and a request framed as a fishing expedition into the government's evidence is unlikely to succeed. Used correctly, each of these motions reaches information the others do not.

Trial, Detention, and Post-Trial Motions

Once a case survives the pretrial stage, a second set of motions governs detention, the conduct of the trial, and what happens after the verdict.

Detention and bond. Pretrial release is governed by 18 U.S.C. § 3142. A defendant may be released, released on conditions, or detained; § 3142(f) provides for a detention hearing, and § 3142(g) lists the factors the court weighs, including the nature of the offense, the weight of the evidence, the defendant's history, and the danger to the community. In certain drug and firearm cases, § 3142(e)(3) creates a rebuttable presumption in favor of detention that the defense must confront with evidence. The framework was upheld in United States v. Salerno. When a magistrate judge orders detention, § 3145 allows the defense to seek review by the district court, and a detention order can be reopened on a showing of changed circumstances or newly available information.

Trial motions. A James hearing, arising from United States v. James in the Fifth Circuit, asks the court to decide whether the government has shown a conspiracy by a preponderance of the evidence before co-conspirator statements are admitted under Rule 801(d)(2)(E); Bourjaily v. United States governs how the court makes that preliminary finding, and statements are sometimes admitted 'subject to connection.' A Daubert motion under Rule 702 invokes the court's gatekeeping role to exclude unreliable or irrelevant expert testimony, whether the target is a forensic-laboratory method or a law-enforcement 'drug-trade' opinion; Daubert v. Merrell Dow, Kumho Tire v. Carmichael, and General Electric v. Joiner frame the reliability analysis. A motion in limine under the Federal Rules of Evidence secures advance rulings so that prejudicial material is not blurted in front of the jury.

Judgment of acquittal. After the government rests — and again after both sides close — a Rule 29 motion for judgment of acquittal argues that the evidence is legally insufficient for any rational juror to find the essential elements beyond a reasonable doubt, the standard associated with Jackson v. Virginia. The motion can be made mid-trial under Rule 29(a), the court may reserve its ruling under Rule 29(b), and it may be renewed after the verdict under Rule 29(c). Because sufficiency is a legal question, a Rule 29 motion is one of the most important issues to preserve for the Fifth Circuit.

New trial and plea withdrawal. A Rule 33 motion asks the court to vacate the verdict and grant a new trial in the interest of justice, including on the basis of newly discovered evidence or a Brady violation surfacing after trial. Before sentencing, a Rule 11(d) motion seeks to withdraw a guilty plea; after the plea is accepted but before sentence, the defendant must show a fair and just reason, while a plea may be withdrawn for any reason before the court accepts it. Each of these motions carries its own deadline, discussed in the deadlines section below, and each must be supported by a concrete factual record rather than argument alone.

Federal Motion Deadlines & the Speedy Trial Act

Federal criminal practice runs on strict, overlapping clocks. Two of them come from the Speedy Trial Act, and others come from the Federal Rules of Criminal Procedure. Missing a deadline can forfeit a motion; missing a Speedy Trial Act limit can, in some circumstances, require dismissal of the charge.

The Speedy Trial Act. Codified at 18 U.S.C. § 3161, the Act sets two headline limits. Under § 3161(b), the government generally must file an indictment or information within 30 days of arrest or service of a summons. Under § 3161(c)(1), trial generally must begin within 70 days of the later of the indictment or information and the defendant's first appearance. Those clocks are not absolute: § 3161(h) excludes broad categories of delay — time spent on pretrial motions, competency examinations, and ends-of-justice continuances granted under § 3161(h)(7), among others — so the calendar days that elapse are rarely the days that count. When a limit is exceeded, § 3162(a)(2) supplies the remedy, and the court decides whether dismissal is with or without prejudice. The statutory clock runs alongside the separate Sixth Amendment right analyzed under Barker v. Wingo.

Motion and post-trial deadlines. Under Rule 12(c), the district court sets the deadline for pretrial motions, and Rule 12(b)(3) motions filed after it can be treated as untimely absent good cause. Rule 33 sets the windows for a new-trial motion: a motion grounded on newly discovered evidence must be filed within three years of the verdict or finding of guilty, while a motion on any other ground must be filed within 14 days. The table below summarizes the core federal timing rules.

These deadlines vary by court and case — local rules, standing orders, excludable-time computations, and case-specific scheduling can all change how a limit applies. Treat the figures above as a general guide, not a substitute for legal advice, and confirm every date with counsel.

How L&L Files Motions in Federal Cases

L&L Law Group is a Frisco, Texas criminal-defense firm founded by Co-Founding Partners Reggie London and Njeri London. The firm represents people charged in federal criminal matters in the Northern and Eastern Districts of Texas, whose appeals are heard by the Fifth Circuit. Federal motion practice is technical and deadline-driven, and the firm approaches it methodically rather than by formula.

Our work on a federal case generally follows a sequence. We start by reviewing the charging instrument, the government's Rule 16 discovery, any search-warrant affidavits and Title III applications, and the detention record. From that review we identify the constitutional and statutory issues a motion can reach — a questionable search under the Fourth Amendment, a statement taken without a valid waiver, a defect in the indictment, a discovery obligation the government has not met, or an expert opinion that may not satisfy Rule 702. Where a matter is still under investigation, early involvement can also mean addressing detention and grand-jury issues before an indictment is even returned.

We then calendar every deadline that governs the case, including the court's Rule 12(c) pretrial-motion date and the Speedy Trial Act clocks under 18 U.S.C. § 3161, so that no available motion is forfeited for timing. Where the facts support it, we draft the motion with a supporting memorandum and the record evidence it needs, file it, respond to the government's opposition, and argue it at any hearing the court sets — a Franks hearing, a detention hearing under § 3142, a James hearing, or a Daubert hearing, as the case requires. When a motion is denied, we build and preserve the record so the issue is available on appeal to the Fifth Circuit.

What we do not do is promise a result. Whether a motion is granted depends on the facts, the record, the governing Fifth Circuit precedent, and the judge assigned to the case — variables no lawyer controls. What a client can expect is that the available motions are identified, filed on time, and argued on the strongest grounds the facts and record support, and that the reasoning behind each decision is explained in plain terms.

If you or a family member is under federal investigation or has been charged in the Northern or Eastern District of Texas, you can reach L&L Law Group at (972) 370-5060 or info@landllawgroup.com to discuss the case. The sooner counsel reviews the discovery and the deadlines, the more room there is to file the motions that federal practice makes available.

How Courts Have Shaped Federal Motion Practice

Motions draw their force from controlling case law as much as statutes. These decisions—verified against primary sources—frame the practice indexed on this page.

• Mapp v. Ohio, 367 U.S. 643 (1961) — Evidence obtained through searches and seizures that violate the Fourth Amendment is inadmissible in state criminal prosecutions, extending the exclusionary rule to the states.
• Wong Sun v. United States, 371 U.S. 471 (1963) — Evidence derived from an unlawful search or arrest is inadmissible unless its connection to the illegality becomes attenuated enough to dissipate the taint.
• Franks v. Delaware, 438 U.S. 154 (1978) — A defendant may obtain a hearing challenging a search-warrant affidavit by substantially showing it contained a knowing or reckless falsehood necessary to probable cause.
• Brady v. Maryland, 373 U.S. 83 (1963) — Prosecutors violate due process by suppressing evidence favorable to the accused that is material to guilt or punishment, regardless of good or bad faith.
• Giglio v. United States, 405 U.S. 150 (1972) — The prosecution's disclosure duty extends to impeachment evidence, including promises of leniency to key witnesses, and binds the entire prosecutor's office.
• Jackson v. Virginia, 443 U.S. 307 (1979) — Evidence is legally sufficient if, viewed most favorably to the prosecution, any rational trier of fact could find the essential elements beyond a reasonable doubt.
• Blockburger v. United States, 284 U.S. 299 (1931) — Two statutory provisions are separate offenses for double-jeopardy purposes if each requires proof of a fact the other does not.
• United States v. Salerno, 481 U.S. 739 (1987) — Pretrial detention of dangerous arrestees under the Bail Reform Act is constitutional regulation, not punishment, and does not facially violate due process.
• Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993) — The Federal Rules superseded Frye; trial judges act as gatekeepers ensuring expert scientific testimony rests on valid methodology and is both relevant and reliable.

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