What Motions Should Your Attorney Be Filing? A Defendant's Guide

If your criminal case has been going on for months and your attorney hasn't filed a single motion, you need to ask why.

Motions are the primary weapon in a defense attorney's arsenal. They're formal requests to the court that can suppress evidence, dismiss charges, exclude testimony, and force the prosecution to play fair. Some of the biggest case wins happen not at trial, but at motion hearings weeks or months before.

And yet, many defendants have no idea what motions are, which ones apply to their case, or whether their attorney has filed any.

Let's fix that.

What Is a Motion?

You sit in the courtroom gallery watching a hearing for someone else's case. The defense attorney stands, hands the judge a stack of paper, and argues for five minutes. The judge nods and rules: evidence excluded. The defendant's case just changed, and no jury was ever involved.

A motion is a written request to the judge asking them to do something, exclude evidence, compel the prosecution to turn over documents, dismiss charges, or rule on a legal issue before trial.

Motions are filed in writing, and the judge usually holds a hearing where both sides argue. The judge then makes a ruling. That ruling can fundamentally change your case.

Some motions can end your case entirely. Others can remove the prosecution's strongest evidence. Even motions that get denied can set up important issues for appeal.

But here's what nobody mentions: motions are where cases are actually won or lost. Trial gets all the attention, but the motion hearings that happen months before trial determine what evidence the jury sees, what arguments the prosecution can make, and whether the case even goes to trial at all.

The most important battles in your case happen at motion hearings, and most defendants do not even know those hearings exist.

Ask your attorney today: "What motions have been filed in my case, and what motions are you planning to file?" Write down the answer.

The Motions Every Defendant Should Know About

Motion to Suppress Evidence

The officer pulls you over on a Tuesday night. No traffic violation, no broken taillight, no swerving. Just a "hunch." Everything that follows, the search, the arrest, the evidence, flows from that stop.

What it does: Asks the judge to throw out evidence that was obtained illegally, through an unlawful stop, search, seizure, or interrogation.

When it matters:

• Police pulled you over without reasonable suspicion
• They searched your car, home, or person without a valid warrant or exception
• You were interrogated without Miranda warnings
• A confidential informant's tip didn't have sufficient reliability
• GPS tracking or phone surveillance was done without proper authorization

Why it's powerful: If the judge grants a suppression motion, the prosecution loses that evidence. In drug cases, suppressing the drugs themselves can mean the entire case gets dismissed. In DUI cases, suppressing the traffic stop can eliminate everything that followed.

But here's what nobody mentions: suppression motions have early deadlines, often 30-45 days after arraignment. If your attorney misses that window, the evidence stays in regardless of how illegally it was obtained.

The Fourth Amendment protects you from unreasonable searches and seizures. If the police violated it, your attorney should be filing this motion. If they haven't even discussed it, ask why.

A suppression motion with a deadline is a ticking clock. If your attorney has not discussed it within two weeks of arraignment, ask about it in writing today.

Look up your arraignment date. Count the days. If the 30-day mark is approaching and no suppression motion has been discussed, send the email now.

Motion to Compel Discovery

You ask your attorney what evidence the prosecution has. They say, "We're still waiting." You ask how long they have been waiting. The answer is two months.

What it does: Forces the prosecution to hand over evidence they're required to share but haven't.

When it matters:

• You haven't received police reports, lab results, or witness statements
• The prosecution claims they've turned over everything but you suspect there's more
• Body camera or dashcam footage hasn't been provided
• Expert reports are missing
• The prosecution is dragging their feet

Under Brady v. Maryland (1963), the prosecution is constitutionally required to turn over any evidence that could help your defense. This includes evidence that hurts the credibility of their witnesses, contradicts their theory, or points to someone else.

If your attorney hasn't received full discovery, or suspects the prosecution is hiding something, this motion forces the issue.

So the real question becomes: if the prosecution has had your evidence for months and your attorney has not received it, why has no motion been filed to compel it?

Evidence the prosecution has not turned over is evidence you cannot use in your defense. A motion to compel is not optional when discovery is late, it is necessary.

Ask your attorney one question: "Have we received all discovery?" If the answer is no, the follow-up is: "When are you filing the motion to compel?"

Brady Motion

The prosecution's star witness has two pending felony charges of their own and a deal to testify in exchange for leniency. You have no idea this person exists, let alone what they were promised.

What it does: Specifically demands exculpatory and impeachment evidence the prosecution is required to disclose.

Why it's separate from regular discovery: Brady material includes things the prosecution might not think of as "evidence", like a witness's criminal record, a deal they made with a cooperating co-defendant, complaints against the arresting officer, or evidence that contradicts their theory of the case.

Real-world example: In many drug cases, the prosecution relies on confidential informants. Those informants often have their own criminal cases, pending charges, or deals with the government. That information can destroy their credibility on the stand, but the prosecution won't volunteer it. A Brady motion forces them to.

But here's what nobody mentions: the prosecution's obligation to disclose Brady material exists whether or not your attorney asks for it. Filing the motion creates a record that forces compliance and sets up a Brady violation claim if they hide evidence later.

A Brady motion is not just a request, it is a trap. If the prosecution withholds evidence after a Brady motion is on file, the consequences for them multiply.

Ask your attorney: "Have you filed a Brady motion?" If the answer is no, ask why. There is almost never a reason not to file one.

Motion to Dismiss

The charging document says you committed a crime on March 15. Your employer's records show you were at work 200 miles away. The prosecution has charged the wrong person, or the wrong date, or the wrong statute, and the facts do not support the charge.

What it does: Asks the judge to throw out the charges entirely.

Grounds for dismissal:

• Insufficient evidence, the prosecution can't prove the elements of the charge
• Speedy trial violation, your right to a speedy trial has been violated
• Prosecutorial misconduct, the prosecution did something improper
• Statute of limitations, the charges were filed too late
• Double jeopardy, you're being charged for something you were already tried for
• Grand jury irregularities, (in federal cases) problems with how the indictment was obtained

Motions to dismiss are hard to win, but even filing one forces the prosecution to articulate their case early and can reveal weaknesses.

So the real question becomes: has your attorney even analyzed whether grounds for dismissal exist? The motion may not win, but the analysis should happen in every case.

A motion to dismiss forces the prosecution to show their hand. Even when it loses, it wins intelligence.

Ask your attorney: "Are there any grounds to move for dismissal?" and write down the specific response. A vague "no" without analysis is not an answer.

Daubert or Frye Motion

The lab technician takes the stand and says the substance in your car tested positive for cocaine. The field test that produced that result has a documented false positive rate. Nobody has challenged whether that test meets scientific standards.

What it does: Challenges whether the prosecution's expert witness or forensic science is actually reliable, asking the judge to block testimony that doesn't meet scientific standards.

When it matters:

• Drug identification was done with a field test (notoriously unreliable)
• Blood or breath alcohol testing had calibration issues
• The prosecution's "expert" has questionable credentials
• Forensic evidence (DNA, ballistics, digital forensics) used methods that aren't scientifically reliable
• Drug weight includes packaging (which inflates the amount)

Why it matters: Juries trust experts. If the prosecution's expert says "this is cocaine" or "this blood alcohol level proves intoxication," jurors tend to believe it. A Daubert motion can exclude that testimony before the jury ever hears it.

But here's what nobody mentions: field drug tests, the roadside kits officers use, have false positive rates that would disqualify them as evidence in any other context. Common substances like chocolate, soap, and over-the-counter medications have triggered false positives. A Daubert motion is the tool that challenges whether that test result belongs in a courtroom.

If your case depends on a lab test, a field test, or expert testimony, the reliability of that evidence is not a given, it is a question your attorney should be challenging.

If your charges involve any scientific evidence or expert testimony, ask your attorney: "Have you evaluated the reliability of the testing methods?" That question takes 30 seconds and could reshape your case.

Motion in Limine

The prosecutor plans to tell the jury about an arrest from eight years ago that resulted in no conviction. It has nothing to do with the current charges. But once the jury hears it, they cannot unhear it.

What it does: Asks the judge to block certain evidence or arguments before the jury ever hears them, preventing prejudicial, irrelevant, or inadmissible material from influencing the verdict.

Examples:

• Excluding evidence of prior arrests or convictions that aren't relevant
• Preventing the prosecution from mentioning gang affiliation without proof
• Excluding inflammatory photos that don't prove anything
• Preventing witnesses from testifying about things they didn't personally see (hearsay)

These motions shape what the jury sees and hears. They're tactical, and an experienced attorney files them strategically.

So the real question becomes: what is the prosecution planning to show the jury that has nothing to do with whether you committed this offense? A motion in limine is how you find out and how you stop it.

A motion in limine controls the jury's information diet. What they never hear cannot prejudice them.

If your case is heading toward trial, ask: "What motions in limine are you planning to file?" The answer reveals how much your attorney is thinking about trial strategy versus just showing up.

Motion for Bill of Particulars

The indictment says "possession with intent to distribute" but does not specify what substance, what date, or what location. You are being asked to defend against a charge so vague you cannot prepare for it.

What it does: Forces the prosecution to provide more specific details about the charges against you.

When it matters: Sometimes the indictment or information is vague. "Possession with intent to distribute" doesn't tell you when, where, or what specific substance. A bill of particulars forces the prosecution to commit to specifics, which can narrow their case and expose weaknesses.

But here's what nobody mentions: vague charges benefit the prosecution because they can shift their theory at trial. A bill of particulars pins them down early, which is exactly why they do not volunteer the details.

Vague charges are a prosecution advantage. A bill of particulars eliminates that advantage by forcing specifics they cannot later change.

If your charging document is vague on dates, locations, or specific acts, ask your attorney whether a bill of particulars would narrow the prosecution's case.

Motion to Sever

You sit at the defense table next to a co-defendant you barely know. Their attorney is running a completely different strategy. Their confession, which has nothing to do with you, is about to be read to the same jury deciding your fate.

What it does: If you're charged with multiple counts or co-defendants, this motion asks to separate them into different trials.

Why it matters: Being tried alongside a co-defendant who made a confession can be devastating, even if that confession has nothing to do with you. Jurors hear it and can't unhear it. Severance prevents that contamination.

Similarly, if you're charged with five different offenses, trying them all together can make you look like a career criminal. Separating them gives each charge a fair hearing.

So the real question becomes: is the jury judging you on the evidence against you, or on the combined weight of everything and everyone in the courtroom?

A joint trial with a confessing co-defendant poisons your case with evidence that has nothing to do with you. Severance is the cure.

If you have co-defendants or multiple charges, ask your attorney: "Have you considered a motion to sever?" The answer should include specific reasons for or against, not a generic dismissal.

"My Attorney Says Motions Aren't Necessary"

Your attorney leans back and says, "Motions won't help in your case." No specifics. No analysis. Just a blanket statement that shuts down the conversation.

Maybe. But ask them to explain why each specific motion doesn't apply to your case. Not a general "motions won't help." A specific explanation.

For example:

• Motion to suppress: "The search was conducted with a valid warrant, and I've reviewed the affidavit, it's solid."
• Brady motion: "We've received comprehensive discovery and I've confirmed there are no outstanding materials."
• Motion to dismiss: "The evidence meets the elements of the charge, and there are no procedural deficiencies."

If they can articulate specific reasons, they've done their job. If they wave it off, they may not have analyzed the issue at all.

But here's what nobody mentions: "motions won't help" is the most common excuse from attorneys who have not done the analysis. An attorney who has reviewed discovery, studied the police reports, and examined the search can give you motion-by-motion reasons. An attorney who has not done that work can only give you generalities.

"Motions won't help" without a motion-by-motion explanation is not a legal conclusion, it is a confession that the analysis was never done.

Ask for the motion-by-motion breakdown. Write down the answer for each one. If the explanations are specific, your attorney has done the work. If they are vague, the work has not been done.

When Should Motions Be Filed?

You check the calendar and realize your arraignment was 38 days ago. The suppression motion deadline in your jurisdiction is 45 days. You have one week left for the most important motion in your case, and your attorney has not mentioned it.

This varies by jurisdiction, but generally:

• Suppression motions: Often have early deadlines, sometimes 30-45 days after arraignment. Miss it, and you lose the right to challenge the evidence.
• Discovery motions: As soon as the prosecution fails to comply with disclosure obligations
• Motions to dismiss: Can be filed at various stages, but sooner is better
• Motions in limine: Typically filed in the weeks before trial
• Daubert motions: Usually filed well before trial to allow for hearings

Key point: Some of these motions have strict deadlines. If your attorney misses the window, the motion can be waived, meaning you lose the right to raise that issue forever. That's why waiting is dangerous. Read more about what happens when your attorney misses a deadline.

So the real question becomes: do you know your deadlines, or is your attorney the only one tracking them?

A motion deadline that passes without a filing is a defense option that disappears permanently. You cannot afford to be the only person not tracking your own deadlines.

Email your attorney right now: "What are the upcoming motion deadlines in my case?" Put the dates in your calendar the moment you receive them.

What to Do Right Now

You close this article, open your email, and start typing. Five minutes from now, your attorney will have a specific written request they cannot dodge.

1. Ask your attorney: "What motions have you filed or plan to file?"
2. If none: Ask them to explain, for each motion listed above, why it doesn't apply
3. Get it in writing: Follow up the conversation with an email summarizing what was discussed, documenting communication is critical
4. Check the court docket: In many jurisdictions, you can look up your case online and see what's actually been filed

But here's what nobody mentions: the court docket does not lie. Your attorney might tell you motions are being prepared, being considered, or coming soon. The docket shows what was actually filed and when. That is the only record that matters.

The docket is the truth. Everything else is a promise.

If you're not getting clear answers, it may be a sign your attorney isn't actually working your case. If you want someone to review your case and identify which motions should have been filed, that's exactly what we do.

Not sure where your case stands? Take the free Case Progress Score, 5 minutes to see what's been done, what's missing, and what to push on next.

---

This is legal information, not legal advice. We are not attorneys and do not provide legal representation. We provide research, analysis, and questions to help you work more effectively with your attorney.