California Penal Code 836 lets a peace officer arrest someone without a warrant in three situations: when a public offense is committed in the officer’s presence, when the officer has probable cause to believe the person committed a felony (whether or not the officer saw it), and in certain domestic violence situations, including a mandatory arrest when the officer has probable cause to believe the person knowingly violated a domestic violence protective order.1California Legislative Information. California Code PEN 836
That is the whole shape of the statute. Everything else is detail about how those three pieces work in practice, what they don’t cover, and what has to happen once someone is in handcuffs.
The Three Warrantless Arrest Scenarios
Penal Code 836 authorizes a peace officer to make a warrantless arrest in three defined situations.
The first is a public offense committed in the officer’s presence. If the officer has probable cause to believe the person committed a public offense and was there to observe it, an arrest is permitted. Courts have read “presence” broadly. It is not limited to seeing the offense with one’s eyes; hearing or smelling can be enough to put the officer on the scene of an offense.
The second is a felony on probable cause. An officer can arrest when there is probable cause to believe the person committed a felony, even without having witnessed anything, and even if a felony has not actually occurred. What matters is whether the officer’s belief was reasonable at the time. An officer arriving at a robbery scene after the fact can still make an arrest based on witness descriptions, surveillance footage, or other evidence pointing to a particular person.1California Legislative Information. California Code PEN 836
The third is a reported violation of a domestic violence protective or restraining order. When an officer responds to such a report and has probable cause to believe the person knew about the order and violated it, the officer must arrest. The statute uses “shall,” not “may.”
Felony vs. Misdemeanor: Why the Distinction Runs Everything
The felony/misdemeanor line shapes every 836 decision an officer makes in the field.
For felonies, the rule is broad. Probable cause is enough, regardless of whether the officer personally witnessed anything. That flexibility exists because the offenses in this category — robbery, sexual assault, homicide, and the like — carry stakes that make waiting for a warrant genuinely dangerous.
For misdemeanors, the default rule is stricter. To arrest without a warrant, the officer generally must have witnessed the offense. An officer who arrives after a bar fight ends and hears about it only from bystanders typically cannot arrest anyone on the spot for misdemeanor battery. This is the point where 836 most often surprises people. A report of a crime is not the same as an arrestable offense in an officer’s presence, and for ordinary misdemeanors, the officer either needs to have been there or needs a warrant.1California Legislative Information. California Code PEN 836
The Domestic Violence Exceptions
Penal Code 836 carves out two important departures from the general rules above.
The first is subdivision (d), which allows a warrantless arrest for a misdemeanor assault or battery against a family member, dating partner, cohabitant, or certain other people in a close relationship, even when the officer was not present. Two conditions attach. The officer must have probable cause to believe the assault or battery occurred, and the officer must make the arrest as soon as that probable cause develops. Sitting on a report for days and then making a warrantless arrest is not what the statute contemplates.1California Legislative Information. California Code PEN 836
The second is the protective order provision, and it works in the opposite direction from most arrest rules. When an officer responds to an alleged violation of a domestic violence restraining order and has probable cause to believe the subject knew about the order and violated it, the arrest is mandatory. The officer has no discretion to walk away or defer to the protected person’s preferences.1California Legislative Information. California Code PEN 836
Probable Cause Alone Does Not Let Officers Enter a Home
Penal Code 836’s authority to arrest is not the same as authority to enter a private residence to do it. The U.S. Supreme Court held in Payton v. New York that the Fourth Amendment prohibits a warrantless, nonconsensual entry into a suspect’s home for a routine felony arrest.2Justia. Payton v. New York Probable cause alone is not enough at the threshold; officers need a warrant or a recognized exception.
California’s Penal Code 844 layers on a state-law requirement. Before breaking open a door or window to make an arrest, officers must demand admittance and explain why they are there. This is California’s knock-and-announce rule.3California Legislative Information. California Code PEN 844
Exceptions exist for genuine emergencies: hot pursuit of a fleeing suspect, immediate danger to someone inside, imminent destruction of evidence, or a strong likelihood that announcing would provoke violence. Courts look hard at these justifications. A criminal record on its own is not enough to justify skipping the knock.4Congress.gov. U.S. Constitution – Fourth Amendment
Arrests Made on a Warrant
Penal Code 836 also authorizes arrests made in obedience to a warrant. The mechanics of getting one sit in Penal Code 817. A peace officer (or, if the suspect is an officer, a prosecutor’s employee) submits a sworn declaration of probable cause to a magistrate describing the offense and explaining why the named person is believed to have committed it. The magistrate can question the officer or witnesses under oath before deciding, and if satisfied, signs the warrant. California allows the declaration and warrant to be transmitted electronically with a digital signature.5California Legislative Information. California Code PEN 817
An arrest made on a warrant carries the judicial oversight that a warrantless arrest lacks, and that difference matters if the arrest is later challenged.
What Happens Immediately After a 836 Arrest
Two deadlines start running the moment someone is taken into custody.
Phone Calls Within Three Hours
Under Penal Code 851.5, an arrested person has the right to make at least three completed phone calls immediately upon booking, and no later than three hours after arrest. The calls can go to an attorney, a bail bondsman, or a family member. Calls to an attorney cannot be monitored or recorded. A custodial parent responsible for a minor child gets two additional calls to arrange childcare.6California Legislative Information. California Code PEN 851.5
Arraignment Within 48 Hours
Penal Code 825 requires that an arrested person be brought before a magistrate within 48 hours, excluding Sundays and holidays. If the 48-hour window closes while court is not in session, the deadline extends to the next court session. There is a specific rule for Wednesday arrests made after court has adjourned: the person must appear no later than Friday, assuming Friday is not a court holiday.7California Legislative Information. California Code PEN 825
Miranda Is Not Automatic
Being arrested does not, by itself, require officers to read Miranda warnings. Officers must give the warnings before a custodial interrogation, meaning questioning that happens while the person is in custody or otherwise not free to leave. If officers do not plan to question you, they are not required to read your rights at the scene.8Justia. Miranda v. Arizona
If officers question you in custody without the warnings when they were required, your statements generally cannot be used against you at trial. A narrow public safety exception permits focused safety-related questions, such as the location of a hidden weapon or an injured victim, before warnings are given. That exception covers the emergency, not broader investigative questioning.
Challenging an Arrest Made Under Penal Code 836
The Fourth Amendment forbids unreasonable seizures, and an arrest made without the probable cause that 836 requires falls into that category.4Congress.gov. U.S. Constitution – Fourth Amendment
The most direct tool is a motion to suppress evidence under Penal Code 1538.5. If the arrest lacked probable cause, or if officers conducted an illegal search flowing from that arrest, the resulting evidence can be excluded from trial. When the evidence is central to the case, exclusion often ends the prosecution.9California Legislative Information. California Code PEN 1538.5
A civil claim is also possible. California’s Tom Bane Civil Rights Act, Civil Code 52.1, allows a person to sue for damages when constitutional rights are violated through threats, intimidation, or coercion. Remedies include compensatory damages, injunctive relief, and attorney’s fees.10California Legislative Information. California Code CIV 52.1 – Tom Bane Civil Rights Act
Officers who make unlawful arrests can also face internal discipline, ranging from reprimand to termination. Those consequences run independently of the criminal case.