Police at the door with a search warrant, or a call saying your home, car, or phone has been searched, is frightening. A warrant gives police real power, but that power has limits, and Massachusetts enforces them.
This guide walks through a search warrant in the order it happens: how police get one, what it must say, how it is carried out, and how it can be challenged. For the broader rules on searches, including searches without a warrant, see our main guide, Challenging a Search in Massachusetts: Motions to Suppress Under the Fourth Amendment and Article 14.
First, the Basics: What a Search Warrant Is
A search warrant is a court order that allows police to search a specific place for specific evidence, even without the owner’s permission.
The Fourth Amendment to the U.S. Constitution and Article 14 of the Massachusetts Declaration of Rights both require that a warrant be based on probable cause, supported by a sworn statement, and describe the place and items with detail. Massachusetts spells out the process in G.L. c. 276, §§ 1–3A.
A search warrant is different from an arrest warrant, which allows police to arrest a person, and from a default warrant, which issues when someone misses court.
Step 1: How Police Apply for a Warrant
To get a warrant, an officer must convince a court official, in a sworn written statement, that evidence of a crime will probably be found in a particular place.
That statement is called an affidavit. The officer must appear before the court official in person or by electronic means and swear to it. The affidavit must lay out the facts the officer relies on (G.L. c. 276, § 2B).
Probable cause means a fair probability, based on facts, not hunches, that the items sought are connected to a crime and will be found in the place to be searched when the warrant issues. Courts call that connection the nexus. Old information can go stale: if too much time has passed, the evidence may no longer be likely to be there.
Informants. Many warrants rely on tips from a confidential informant, a person who gives police information without being named. Massachusetts applies a stricter test than federal law. Under Article 14, the affidavit must show how the informant knows the information (the basis of knowledge) and why the informant should be believed (the veracity), or police must independently corroborate the tip. This is known as the Aguilar-Spinelli test, which the Supreme Judicial Court (SJC) kept in Commonwealth v. Upton, 394 Mass. 363 (1985). See our post on confidential informants and search warrants.
Step 2: Who Signs the Warrant and What It Must Say
A judge or clerk-magistrate reviews the affidavit, and if it shows probable cause, signs a warrant that must describe exactly where police may search and what they may take.
Judges and court clerks, including clerk-magistrates, may issue search warrants (G.L. c. 218, § 33). The person issuing it must be neutral, not working with the police.
The warrant must describe the building, vehicle, or place to be searched and particularly describe the items to be seized (G.L. c. 276, § 2). This particularity requirement keeps a warrant from becoming a license to rummage through everything you own.
The warrant also controls timing. It allows a daytime search unless it expressly authorizes a nighttime search (§ 2).
Since the 2020 police reform law, a no-knock warrant, one that lets police force their way into a home without first announcing themselves, can be issued only by a judge. The affidavit must show probable cause that announcing would endanger lives, and the officer must state that there is no reason to believe children or adults over 65 are in the home, unless they themselves face a credible risk of imminent harm (G.L. c. 276, § 2D(a)).
Step 3: How Police Carry Out the Warrant
Police must follow the warrant’s limits and the rules for entry, and a violation can make the evidence unusable in court.
Knock and announce. Before forcing their way into a home, officers must knock and announce who they are and why they are there, unless a judge issued a no-knock warrant or there is a credible risk of imminent harm. Evidence obtained in violation of these rules is inadmissible (G.L. c. 276, § 2D(b)–(d)).
Scope. Police may search only the places named, and only where the listed items could be. If the warrant is for a large television, they have no business opening small jewelry boxes. Police can generally keep people at the scene while the search is carried out (Michigan v. Summers, 452 U.S. 692 (1981)).
Seizure and return. Officers seize the listed items and hold them under the court’s direction (§ 3). The warrant must be returned to the court as soon as it is served, and no later than seven days after it issued, with a report of what was done (§ 3A). In practice, that means a warrant must be used within seven days, and the return usually includes a list of what was taken.
The affidavit is kept by the court and is not a public document until the warrant is returned (§ 2B).
Step 4: Warrants for Cell Phones and Digital Devices
A phone holds far more personal information than a house, so Massachusetts courts demand a tighter link to the crime and narrower limits on what police may look at.
Police generally need a warrant to search the data on a phone, even after an arrest (Riley v. California, 573 U.S. 373 (2014)). And the warrant needs its own nexus. The SJC has held that an officer’s general belief that people use phones to commit crimes is not enough on its own (Commonwealth v. White, 475 Mass. 583 (2016)). There must be specific, not speculative, information linking that phone to the crime (Commonwealth v. Henley, 488 Mass. 95 (2021)).
Particularity matters even more for phones. The SJC has said phone searches must be done with special care and meet a narrower standard than searches of physical places (Commonwealth v. Dorelas, 473 Mass. 496 (2016)). In Commonwealth v. Snow, 486 Mass. 582 (2021), the Court held that a phone warrant with no time limit was too broad, and that the remedy was to suppress evidence falling outside a reasonable time frame.
Delay also counts. In White, police held a seized phone for 68 days before applying for a warrant, and the SJC found that delay unreasonable. For more, see our post on cell phone privacy.
Step 5: If Police Arrive With a Search Warrant
Stay calm and save your challenges for court, where they can actually succeed.
You can ask to see the warrant. Officers commonly show it or leave a copy, which tells you what they are allowed to search for. Physically resisting or arguing at the door will not stop the search and can lead to new charges.
A warrant allows a search; it does not require you to answer questions. You can say you want to speak with a lawyer. Anything you say during the search can be used against you, and statements are covered by separate rules explained in our guide to police interrogations.
Afterward, write down what you remember while it is fresh: the time police arrived, whether they knocked and announced, where they searched, and what they took. Keep any paperwork they leave. Then call a lawyer.
Step 6: Challenging a Search Warrant in Court
If charges follow, your lawyer can file a motion to suppress, asking the judge to rule that evidence from a defective warrant or search cannot be used against you.
Our Fourth Amendment guide explains how a motion to suppress works from start to finish. Warrant cases raise a few particular issues.
The four corners. When the question is whether the warrant showed probable cause, the judge looks only at what is written inside the four corners of the affidavit (Commonwealth v. O’Day, 440 Mass. 296 (2003)). Police cannot fill gaps later with facts they left out. A careful reading often reveals missing links, stale information, or an informant tip that fails Aguilar-Spinelli.
False statements: Franks and Amral hearings. If an officer knowingly or recklessly included false statements that were needed to find probable cause, the evidence must be suppressed (Franks v. Delaware, 438 U.S. 154 (1978)). Getting a Franks hearing requires a substantial preliminary showing of that falsity.
When the questionable statements concern a confidential informant, Massachusetts offers an extra step. If the defense files an affidavit with facts that cast reasonable doubt on what the officer said about the informant, the judge may hold a private Amral hearing, questioning the officer and, if needed, the informant, without the defense present, to decide whether a full Franks hearing is warranted (Commonwealth v. Amral, 407 Mass. 511 (1990)).
How it was carried out. Even a valid warrant can be executed unlawfully: no knock and announce, a nighttime search without authorization, a search beyond the listed places or items, or a warrant used after the seven-day window. If the motion succeeds and the suppressed evidence was central, the case may be dismissed.
Frequently Asked Questions
Can police search without a warrant?
Sometimes, under limited exceptions such as consent, emergencies, and certain car searches. A warrantless search is presumed unreasonable, and the prosecution must justify it. See our Fourth Amendment guide and our post on pat frisks.
Can I see the affidavit police used?
It is not public until the warrant is returned to court (G.L. c. 276, § 2B). If you are charged, your lawyer will obtain it and review it closely.
Will I get my property back?
Seized items are held as long as they are needed as evidence. Stolen property is returned to its owners, and other items are disposed of as the court orders. Some property, such as unlawfully kept weapons, can be forfeited (G.L. c. 276, § 3).
Was Your Home, Car, or Phone Searched? Talk to a Lawyer About the Warrant
Whether a warrant holds up often depends on details in the affidavit and in how the search was carried out. The Law Office of William J. Barabino in Medford has over 23 years of experience in Massachusetts criminal defense, including search warrant challenges, and represents clients throughout Greater Boston.
Call 781-393-5900 for a confidential consultation. Keep any copy of the warrant or inventory police left with you.
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Disclaimer
This article is for general educational purposes only and is not legal advice. Search warrant law depends heavily on the specific facts, and statutes and court decisions change. Reading this page does not create an attorney-client relationship. If your home, car, phone, or property has been searched, consult a licensed Massachusetts criminal defense attorney about your situation.
