Guilt-Phase 404(b) Notice: Forcing Disclosure of Extraneous Offenses

What Does a Rule 404(b) Notice Request Actually Cover?

Rule 404(b) has two moving parts. Subsection (b)(1) forbids using an extraneous crime, wrong, or act to prove the defendant acted in character; subsection (b)(2) lets the defense demand advance notice of any such evidence the State plans to use in its guilt-phase case-in-chief, so trial is never an ambush.

The rule’s notice clause is narrow and specific. As Texas courts read the current text, “[o]n timely request by a defendant in a criminal case, the prosecutor must provide reasonable notice before trial that the prosecution intends to introduce such evidence — other than that arising in the same transaction — in its case-in-chief.” Three limits are built into that sentence. The obligation is triggered only by a request; it reaches only the case-in-chief; and it exempts evidence that arises in the same transaction as the charged offense.

The purpose is practical, not technical. The notice provision exists so the accused can prepare to meet the extraneous-offense evidence — investigate it, line up rebuttal, decide whether to testify, and frame a Rule 403 objection — rather than confront it cold in front of the jury. That is why the request is worth making in every case where the State’s file hints at uncharged conduct: a firearm found months earlier, a prior fight, a drug transaction the indictment never mentions.

This page addresses the guilt-innocence phase only. Punishment-stage notice runs through a separate statute, Code of Criminal Procedure article 37.07, section 3(g), and child sex-offense cases add their own regime under article 38.37. Each of those carries a heavier or differently worded disclosure duty, covered on the companion pages. Here the focus is the guilt-phase 404(b) machinery: what triggers it, what it reaches, and what happens when the State ignores it.

Motive, Intent, Identity: The Non-Character Purposes

Rule 404(b) is a rule of inclusion. It excludes an extraneous offense only when the sole purpose is to show the defendant is the kind of person who commits crimes. If the evidence is relevant for some other, non-propensity purpose, the rule lets it in — and the list of permissible purposes is illustrative, not a closed set.

In Montgomery v. State, the Court of Criminal Appeals held that other crimes, wrongs, or acts “may be admissible” when they have relevance apart from character conformity — for example, to prove motive, opportunity, intent, preparation, plan, knowledge, identity, or absence of mistake or accident. The proponent must be able to articulate the specific non-character theory the evidence serves; a bare recital of a listed word does not do the work. If the only logical link between the extraneous act and the charged offense runs through the defendant’s bad character, the evidence is absolutely inadmissible and the trial court has no discretion to admit it.

The modern cases apply the same framework and add a review standard. In Devoe v. State, the court confirmed that extraneous-offense evidence is admissible when it has relevance apart from character conformity, and that a trial court’s ruling stands on appeal so long as it sits within the “zone of reasonable disagreement.” Devoe also makes a point that matters for identity cases: when the perpetrator’s identity is provable only by circumstantial evidence, identity is a contested issue even if the defense rests without putting on a case or advancing a defensive theory. That keeps a genuine non-character purpose alive and, with it, the defendant’s interest in getting advance notice of exactly which extraneous acts the State will use to prove it.

A recurring battleground is intent. When a defendant’s mental state is genuinely disputed, extraneous acts that make the charged intent more probable are classic non-character evidence. But if the State’s direct proof already establishes intent and the defense has not contested it, the extraneous act may add little but prejudice, and its relevance thins. That is one more reason advance notice matters: it lets counsel decide which issues to actually contest, knowing that conceding a point can sometimes strip the State’s extraneous-offense evidence of the relevance that would justify admitting it.

Why the Duty Turns on a Proper, Timely Request

The State owes no 404(b) notice until the defendant asks for it the right way. A request buried in a discovery motion the court never rules on does not trigger the duty; a standalone request served on the State does. And a request made too late — on the morning of trial — is no request at all.

The leading case is Espinosa v. State. There, the defendant relied on a discovery motion to ask for notice but never presented it to the trial court or secured a ruling. The Court of Criminal Appeals held that a motion “requests action by the trial court and is not binding until granted,” so a defendant who routes a 404(b) request through a discovery motion must obtain a ruling to trigger the notice requirement. The court drew a clean distinction: a proper, self-standing request for notice need not be acted on by the judge before the State must comply, because it speaks directly to the State — but a motion asking the court to order notice binds no one until the court orders it.

Espinosa also disposed of a common fallback argument. A motion in limine filed on the day of trial, the court held, is untimely to serve as a 404(b) request; the defense cannot manufacture a notice violation by asking at the last minute. The concurrence spelled out the safe practice that trial lawyers still follow today: file a discrete document titled a request for notice of intent to offer extraneous conduct, cite Rule 404(b), and serve the State well before trial. Doing that converts the State’s silence into error and its late disclosure into a live admissibility fight, instead of leaving the defense to argue about whether a paper it filed was really a request at all.

Because the duty hinges entirely on the request, counsel should treat it as a discrete, calendared task rather than a line item folded into an omnibus motion. Serve it on the prosecutor, keep proof of service, and follow up in writing if the State stays silent as trial nears. A clean paper trail does two things: it forecloses any argument that the request was never really made, and it sets up the strongest possible objection if the State later offers an extraneous offense it never disclosed.

Same-Transaction and Rebuttal Evidence: What Escapes Notice

Two large categories of bad-act evidence sit outside the notice duty. Same-transaction contextual evidence is exempt by the rule’s own text, and rebuttal evidence escapes because the notice clause reaches only the case-in-chief. Knowing which bucket a given fact falls into is often the whole ballgame at a pretrial hearing.

Same-transaction contextual evidence is the uncharged conduct so interwoven with the charged offense that the jury cannot make sense of one without the other. Under Devoe, this evidence is admissible only when the charged offense “would make little or no sense without also bringing in” it, and only to the extent necessary to the jury’s understanding. Because such evidence is treated as intrinsic to the offense rather than as a separate “extraneous” act, the rule expressly carves it out of the notice requirement. The defense counter is to show the two events are separable — that full proof of the charged crime does not require narrating the other.

Rebuttal is the second exemption, and Daggett v. State illustrates it. A defendant who testifies to a blanket claim of good character — for instance, “I would never touch a child” — can open the door, and the State may then use an extraneous act to impeach that false impression, with a limiting instruction on request. Daggett also polices the “plan” purpose: a common plan means the steps a defendant took in preparation for the charged crime, not a string of similar offenses, because “[r]epetition of the same act or same crime does not equal a ‘plan.’” The table below sorts the common categories by whether case-in-chief notice is owed.

The Rule 403 Balancing That Comes After Notice

Clearing the 404(b) hurdle is not the end of the analysis. Even a properly noticed extraneous offense with a valid non-character purpose can still be excluded as unfairly prejudicial. But the defense has to ask: the two objections are separate, and a 404(b) ruling does not decide the Rule 403 question.

Montgomery set out the sequence that Texas courts still use. Once the trial court finds the evidence relevant apart from character conformity, it should admit the evidence “absent a further objection” under Rule 403. At that point the burden shifts to the opponent to show that the probative value of the extraneous act is substantially outweighed by the danger of unfair prejudice. The rule tilts toward admission — relevant evidence is presumed more probative than prejudicial — so the defense must build the record for exclusion rather than assume the judge will weigh it automatically.

The balancing is not freeform. Montgomery directs the court to weigh, among other things, how compellingly the extraneous act serves its non-character purpose, the proponent’s need for it, and its tendency to suggest a decision on an improper basis or to consume undue time. The “need” factor has real teeth: when the State already has strong, undisputed evidence on the fact the extraneous offense is offered to prove, the misconduct evidence weighs far less in the balance. Devoe confirms that all of this is reviewed only for abuse of discretion, so the fight is won or lost with the trial judge. Advance notice is what gives the defense the runway to develop these arguments — to show, with specifics, why a particular bad act should not reach the jury even if it technically fits a 404(b) purpose.

Notice also positions the defense to ask for a limiting instruction. When the court admits an extraneous offense for a specific non-character purpose, the defendant is entitled, on request, to an instruction telling the jury it may consider the act only for that purpose and not as proof of general bad character. Requesting that instruction — both when the evidence comes in and again in the written charge — narrows the damage and preserves the issue. None of that planning is possible if the first the defense hears of the extraneous act is when a witness blurts it out.

What Happens if the State Uses an Un-Noticed Extraneous Offense?

When the defendant made a proper, timely request and the State still springs an un-noticed extraneous offense in its case-in-chief, the evidence should be kept out. Notice compliance is treated as a condition of admissibility, so the first move is a clean objection on the record that the State failed to give the notice Rule 404(b) required.

The trial court has tools short of a mistrial. It can exclude the evidence outright, or it can grant a continuance or recess so the defense can absorb the surprise and prepare — but the court is supposed to use those powers to secure compliance, not to excuse the State’s failure by simply letting the evidence in and telling the defense to cope. Counsel should ask for the specific relief that fits the moment: exclusion when the disclosure is truly last-minute and prejudicial, a continuance when time can cure the problem, and a running objection to preserve the issue if the court admits the evidence anyway.

Preservation matters because appellate review is unforgiving. The complaint on appeal must match the objection at trial, and a defendant who fails to lodge a specific 404(b)-notice objection generally forfeits the point. Even when error is preserved, reviewing courts examine whether the lack of notice actually harmed the defense — whether it undercut the ability to contest admissibility, rebut the evidence, or mitigate it — an inquiry taken up in depth on the companion page about the reasonableness and specificity of the notice. The lesson for the guilt phase is straightforward: make the request correctly, object promptly and specifically, and ask for the precise remedy the situation calls for. That is how a paper request becomes an enforceable limit on what the jury hears.

Where This Fits

This guide is one of four situations that arise under the Motion for Notice of Extraneous Offenses (404(b) / Punishment). 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.

• Montgomery v. State, 810 S.W.2d 372 (Tex. Crim. App. 1991) — Rule 404(b) is a rule of inclusion; an extraneous offense is admissible if it has relevance apart from proving character conformity.
• Devoe v. State, 354 S.W.3d 457 (Tex. Crim. App. 2011) — Extraneous-offense rulings are reviewed for abuse of discretion; admission stands if within the zone of reasonable disagreement on a non-propensity issue.
• Daggett v. State, 187 S.W.3d 444 (Tex. Crim. App. 2005) — A defendant who testifies to blanket good character opens the door to impeachment by extraneous acts; repeating a similar crime is not a plan.
• Espinosa v. State, 853 S.W.2d 36 (Tex. Crim. App. 1993) — A 404(b) request buried in a discovery motion does not trigger notice unless the court rules on it; a day-of-trial request is untimely.

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