Why this page exists alongside the national one
Our national federal search warrants page covers the paper itself in full: what a warrant must contain, the time and hour limits, the inventory and receipt you are owed, delayed notice warrants, digital devices and cloud accounts, and how searches are challenged in court. Read it for the complete picture of search law. This page answers the California questions: what a search means for your status here, what a defense lawyer does for you at this stage, which district and prosecutor's office controls the matter, which courtroom rules apply, and what to do now.
The short version is that the search is federal but the forum is local. The agents carry federal authority wherever they go. The case they are building lands in a specific California district, before a California based federal judge, under the Ninth Circuit's rules. Those local facts shape what your lawyer does next, so they deserve their own page.
What a federal search of your place means
A search warrant is a court order, not a request. It lets agents enter a named place, look for named things, and take them. The authority comes from the Fourth Amendment, which states "The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."
Three requirements sit inside that sentence. Agents must show facts amounting to probable cause. Someone must swear to those facts under oath, usually in a written affidavit you do not get to see yet. And the warrant must describe the place and the things with enough detail that agents cannot simply roam. The rule for getting one states that the judge "must issue the warrant if there is probable cause to search for and seize a person or property or to install and use a tracking device." You are not present when the judge decides. There is no hearing where your side argues first. That one sided process is exactly why courts allow challenges after the fact, which is part of what a lawyer handles below.
A surprise search also tells you something about your status. A grand jury subpoena asks you to bring documents on a stated date. A warrant takes them without warning. Department guidance states that "The general thrust of these guidelines is that a search warrant should not be used to obtain documentary materials from a non-suspect, except where the use of a subpoena or other less intrusive means would jeopardize the availability or usefulness of the materials sought." When the government treats someone as a mere witness holding records, it usually sends a subpoena. A dawn search means agents decided advance notice was too risky. That decision often means the person searched is a subject of the investigation, and the next papers are commonly a grand jury proceeding, a target letter, or an arrest if charges follow. If agents arrived this morning and are still on site, our page on federal raids covers what to do while the search is happening.
What a defense lawyer does at this point
At this stage a defense lawyer works in general terms as a buffer, a preserver, and an early tester of the government's case. The lawyer takes over all communication so agents stop calling you directly. The lawyer tells you what not to touch: no statements, no consent searches, no deleted messages, no moved money, no calls asking others to stay quiet. The lawyer reads the face of the warrant against what agents actually did: the address, the things named, the date against the rule that agents "execute the warrant within a specified time no longer than 14 days," the hour against the daytime rule, and whether you received the copy and receipt the rules require. Notes you kept during the search become the raw material for that review.
Then the lawyer looks forward to court. Fights about warrants happen before a judge, not at the door, since the rule provides that "A defendant may move to suppress" evidence in the court where the trial will occur. Through that motion a lawyer can argue the affidavit lacked probable cause, the warrant described the place or things too vaguely, or agents searched beyond what the warrant allowed. A separate path seeks your property back, asking the court for return of originals you need for work or daily life, or for copies of seized data. Neither path has a guaranteed outcome. Warrant challenges are technical and fact bound, and some searches with real flaws still survive while some clean looking ones fall. The inventory, the warrant, the affidavit if it becomes available, and your notes are what let a lawyer give you a real answer about yours.
The lawyer also opens a channel with the prosecutor's office, because charging decisions belong to prosecutors, not agents. The Justice Manual states the test this way:
"The attorney for the government should commence or recommend federal prosecution if he/she believes that the person's conduct constitutes a federal offense, and that the admissible evidence will probably be sufficient to obtain and sustain a conviction"
An agent at your door cannot file or drop charges. Only the prosecutor applies that test. Any talk of cooperation or proffers should therefore run through your lawyer, who can test whether an offer is real and get it in writing. Start with our California federal courts hub for the map of where these decisions get made, then come back here for what to do about them.
Which California district controls your matter
Congress divided the state by statute. It provides:
"California is divided into four judicial districts to be known as the Northern, Eastern, Central, and Southern Districts of California."
Your matter stays in the district where it would be filed. A search in Los Angeles is a Central District matter from start to finish. One in Sacramento is an Eastern District matter. Transfer between districts is rare and needs a specific legal reason, so find the district named in your papers first.
Court cities are fixed by the same law, so you can tell from your papers where appearances would happen. The law provides:
"Court for the Northern District shall be held at Eureka, Oakland, San Francisco, and San Jose."
It provides:
"Court for the Eastern District shall be held at Bakersfield, Fresno, Redding, and Sacramento."
For the Central District, the Western Division, which covers Los Angeles and three coastal counties, sits in Los Angeles:
"Court for the Western Division shall be held at Los Angeles."
The Southern Division, which is Orange County, provides:
"Court for the Southern Division shall be held at Santa Ana."
For the Southern District the rule is short:
"Court for the Southern District shall be held at San Diego."
If your papers say San Diego, open the Southern District page. If they say Los Angeles, open the Central District page. San Francisco, Oakland, and San Jose point to the Northern District, and Sacramento and Fresno point to the Eastern District.
Appeals leave the district but stay in the circuit. The statute provides:
"From a district court of the United States to the court of appeals for the circuit embracing the district"
For California that court is the Ninth Circuit. An appeal challenges legal error in what already happened, and it runs on strict deadlines measured from the judgment.
The four prosecutor's offices and the four field offices
Each California district has its own United States Attorney's Office, and that office is the audience the agents are building toward. The Central District's office states that it:
"The United States Attorney's Office for the Central District of California serves the seven counties of Los Angeles, Orange, Riverside, San Bernardino, San Luis Obispo, Santa Barbara, and Ventura."
The Northern District's office describes a district that:
"The Northern District of California stretches from Del Norte County in the north to Monterey County in the south."
and notes that it "prosecutes violations of federal law" in the district. The Southern District's office states:
"The Southern District of California includes San Diego and Imperial Counties."
with its main office:
"The main office is headquartered in the city of San Diego"
The Eastern District's office states:
"The United States Attorney's Office for the Eastern District of California represents the federal government in virtually all litigation involving the United States in the Eastern District of California."
Knowing which of the four holds your matter tells your lawyer where to direct early outreach, because that is the office that will apply the charging test quoted above.
On the agent side, the Bureau says:
"The FBI has 56 field offices (also called divisions) centrally located in major metropolitan areas across the U.S. and Puerto Rico."
and adds:
"They are the places where we carry out investigations"
The Bureau's public list places field offices in Los Angeles, Sacramento, San Diego, and San Francisco, with smaller resident agencies in surrounding cities and towns. One California detail stands out in the Bureau's own description:
"Each field office is overseen by a special agent in charge, except our offices in Los Angeles, New York City, and Washington, D.C., which are headed by an assistant director in charge due to their large size."
So a search run out of Los Angeles is run out of one of the three largest field offices in the country. That changes nothing about your rights, but it tells you something about the resources on the other side, and why getting counsel early is not an overreaction.
Your phone, your computer, and your cloud accounts
Most California searches now center on devices, not file cabinets, and this surprises people. Three rules matter most. Our national page covers each in full, so this is the short version with what your lawyer will ask.
First, agents may take the device now and read it later. The rule provides that "A warrant under Rule 41(e)(2)(A) may authorize the seizure of electronic storage media or the seizure or copying of electronically stored information." It adds that unless the warrant says otherwise, it "authorizes a later review of the media or information consistent with the warrant." And the deadline for executing the warrant "refers to the seizure or on-site copying of the media or information, and not to any later off-site copying or review." In plain words, agents can carry out your laptop on day one and search its contents for weeks, as long as the later search stays within what the warrant allowed. Your lawyer will ask exactly which devices were taken and whether the review stayed inside the warrant's limits.
Second, recent email held by your provider generally needs a warrant too. The Stored Communications Act provides that "A governmental entity may require the disclosure by a provider of electronic communication service of the contents of a wire or electronic communication, that is in electronic storage in an electronic communications system for one hundred and eighty days or less, only pursuant to a warrant issued using the procedures described in the Federal Rules of Criminal Procedure." Older stored mail and account records fall under different subsections with different showings, which is why a lawyer will ask exactly what kind of records were taken and under what order.
Third, your location history has Supreme Court protection. In Carpenter v. United States the Court held that "an individual maintains a legitimate expectation of privacy in the record of his physical movements as captured through CSLI," meaning historical cell site location information from a wireless carrier. It concluded that "the Government must generally obtain a warrant supported by probable cause before acquiring such records." Agents who pulled months of your movements from a carrier with only a lesser court order may face a suppression fight. If you suspect that happened, tell your lawyer how you learned of it and bring any related paperwork.
If agents searched a law office or took privileged material
Searches of an attorney's office get extra supervision inside the Justice Department, because agents may stumble onto other clients privileged material. Department policy states that "prosecutors are expected to take the least intrusive approach consistent with vigorous and effective law enforcement when evidence is sought from the premises of a subject attorney," including email and cloud accounts held by a provider. Prosecutors are told to consider subpoenas or other sources first, and special approval and filtering procedures apply.
The same warning applies to your own devices. If agents took phones or computers holding your communications with a lawyer, say so at your very first meeting with new counsel. Privilege issues must be raised early and in the right court, or they can slip away.
Your rights while the search happens, and the two traps
You have rights during the search, and each one is simple to use. You may remain silent. Say that you are remaining silent and that you want a lawyer, then stop talking about the facts. You may ask for a lawyer at any point. Agents can keep searching the places the warrant covers, but they must respect your decision not to answer. You may watch and take notes. Write down badge numbers, what rooms and devices agents searched, what they took, and anything they did outside the warrant's limits. Do not get in their way while you do it. You should not consent to anything beyond the warrant. Agents may ask to look at places or devices the warrant does not cover. You may refuse. Consent expands the search, and refusing a voluntary request is not obstruction.
Two traps create new criminal liability on the spot, so avoid both. Do not lie to agents. Federal law punishes anyone who "makes any materially false, fictitious, or fraudulent statement or representation" to federal investigators, and the penalty clause provides "imprisoned not more than 5 years or, if the offense involves international or domestic terrorism (as defined in section 2331), imprisoned not more than 8 years, or both." That five year figure is the statutory maximum for the false statement charge itself, not a prediction about any case. No oath is required and no signed form is required. Silence is lawful. A false denial is a new charge.
Do not destroy, hide, or alter anything once you know of the search. If that conduct ever reached trial in California, the jury would hear the Ninth Circuit's model instructions, not a nationwide generic set. The circuit's obstruction instruction lists two things the government must prove beyond a reasonable doubt. First:
"the defendant influenced, obstructed, or impeded, or tried to influence, obstruct, or impede the due administration of justice"
Second:
"the defendant acted corruptly, or by threats or force, or by any threatening communication, with the intent to obstruct justice"
On the word corruptly, the instruction explains that it "must be done with the purpose of obstructing justice." An act done for a legitimate reason, without that purpose, does not satisfy the element. And one sentence in the instruction matters for anyone tempted to talk their way out. It states:
"If the corrupt act at issue involved the making of a false statement, materiality of the false statement is a required element of the crime."
In plain terms, the government must prove the lie mattered, not just that it was uttered. Deleting files or coaching a witness to stay quiet can add an obstruction exposure on top of whatever the agents came about. Preserve everything exactly as it is and let your lawyer decide what must be produced and how. Our federal sentencing page walks through how punishment is decided if charges ever follow.
What to do now
Act early and say little. If a target letter arrives, keep the envelope and note the date. If a grand jury subpoena arrives, note the return date and destroy nothing it describes. Keep the warrant, inventory, and receipt in one folder and bring them to every lawyer meeting. Write down privately everything you remember about the search while it is fresh: who came, when, what was asked, what was said, whether agents announced before forcing anything. Preserve all documents, messages, and devices exactly as they are. Stop discussing the facts with anyone except your lawyer, including family, friends, and business partners. Note the district and the city named in any papers, and plan to arrive early if you must appear, since security lines at the big California courthouses run long on busy mornings.
Do not call agents to explain or clear things up. Do not contact witnesses or ask anyone to delete anything. Do not post about the search. Do not consent to follow up searches without counsel. Each of these can create new evidence or new charges out of a situation that calls for quiet.
Then get advice before you decide anything. Whether to sit for an interview, produce records, cooperate, or say nothing turns on facts you cannot judge alone in the first days: what the agents already have, what the prosecutor's office believes, and what your words would add. A lawyer can make those calls with you. The penalties described on this page are statutory maximums, never predictions about any one person. Two people searched in the same investigation routinely face very different outcomes because their conduct after the search differed. The facts of a case change everything.