California Penal Code 836 lets a peace officer arrest you without a warrant in three main situations: when you commit any public offense in the officer’s presence, when the officer has probable cause to believe you committed a felony (whether or not the officer saw it), and in a handful of specific misdemeanor situations the legislature has singled out, most notably domestic violence.1California Legislative Information. California Penal Code 836 Everything else about a warrantless arrest, from what the officer must tell you to how quickly you must see a judge, flows from that starting point.
Arrests for Offenses the Officer Witnesses
The default rule for misdemeanors is simple. If a peace officer has probable cause to believe you committed a public offense in the officer’s presence, the officer can arrest you on the spot without a warrant.1California Legislative Information. California Penal Code 836 “In the officer’s presence” is not limited to what the officer sees. It covers any of the officer’s senses: watching a shoplifter walk out with merchandise, hearing a fight, smelling marijuana smoke in a prohibited area.
When an officer shows up after a misdemeanor is already over and didn’t perceive it happening, the general rule flips the other way. The officer usually cannot make a warrantless arrest. The normal path is to take a report, investigate, and go to a judge for a warrant. This “presence” requirement is one of the most important limits on police arrest power in California, and it covers the large majority of low-level offenses. The exceptions below are narrow and specific.
Warrantless Felony Arrests
Felonies work under a much more permissive rule. An officer does not need to witness a felony to arrest you for it. Penal Code 836 provides two separate grounds, and the distinction can matter if the arrest is later challenged.
The first ground is probable cause. An officer can arrest you if the officer has probable cause to believe you committed a felony, even if it later turns out no felony actually occurred.1California Legislative Information. California Penal Code 836 Probable cause means specific, articulable facts that would lead a reasonable person to suspect a crime. It is more than a hunch and less than certainty.
The second ground is that a felony was in fact committed and the officer has reasonable cause to believe you did it, even if it happened outside the officer’s presence.1California Legislative Information. California Penal Code 836 This ground usually comes up after the fact, when a court evaluates whether an arrest was lawful.
Misdemeanor Situations Where Officers Don’t Need To See the Crime
The legislature has carved out specific misdemeanors where an officer can arrest without having personally witnessed the offense. These are not general exceptions. Each targets a situation where waiting for a warrant could put someone in danger or let evidence disappear.
Domestic Violence
When an officer has probable cause to believe someone committed an assault or battery against a current or former spouse, cohabitant, dating partner, co-parent, or certain other family members, the officer can arrest without a warrant even though the violence happened before the officer arrived.1California Legislative Information. California Penal Code 836 The same authority extends to assaults or batteries against firefighters and paramedics on duty; officers can arrest with reasonable cause even if they didn’t see the attack.
Protective Order Violations
Violating a domestic violence restraining order triggers a mandatory arrest rule. When an officer responds to a call and has probable cause to believe the person knew about the order and violated it, the officer is required to arrest that person without a warrant.1California Legislative Information. California Penal Code 836 This applies to orders issued under California law and to orders issued by courts of other states or tribes. Notice of the order can be established through proof of service, confirmation from authorities, or evidence the person was present at the hearing where the order was granted.
DUI After a Crash
Vehicle Code 40300.5 lets an officer arrest a suspected drunk driver without a warrant when the driver was in a traffic crash, is found near a vehicle blocking a roadway, might flee if not arrested immediately, poses a risk of injury or property damage, or might destroy evidence.2California Legislative Information. California Vehicle Code 40300.5 Without this provision, an officer investigating a crash after the fact would be stuck under the general misdemeanor “presence” rule, because the officer obviously didn’t see the person driving.
Concealed Firearms in Airport Security Areas
Officers can also make a warrantless arrest for a concealed-firearm violation under Penal Code 25400 when it happens inside an airport’s access-controlled security area and the officer has reasonable cause to believe the person committed the violation.1California Legislative Information. California Penal Code 836 This is a narrow exception limited to airport security zones, not a general rule about carrying firearms in public.
What Officers Must Tell You
Under Penal Code 841, whoever makes the arrest must tell you three things: that you are being arrested, the reason for the arrest, and the authority under which the arrest is being made.3California Legislative Information. California Penal Code 841 The officer can skip this notification only if you are actively committing a crime, are being chased immediately after committing one, or are fleeing after an escape. If you ask what offense you’re being arrested for, the officer must answer.
The 48-Hour Deadline To See a Judge
Under Penal Code 825, you must be brought before a judge without unnecessary delay, and in any event within 48 hours of arrest, not counting Sundays and holidays.4California Legislative Information. California Penal Code 825 If those 48 hours expire while the court isn’t in session, the deadline extends to the next court session. Arraignment is where you are formally told the charges, bail is set, and you can request an attorney. Holding you beyond this window without bringing you before a judge violates California law.
Your Right To Phone Calls
Immediately upon booking, and no later than three hours after arrest, you have the right to make at least three completed phone calls at no charge for local calls. You can call an attorney, a bail bondsman, or a family member or other person. A call to an attorney cannot be monitored, recorded, or eavesdropped on. If you are a custodial parent responsible for a minor child, you get two additional calls to arrange care. These rights apply regardless of immigration status, and any officer who willfully denies them is guilty of a misdemeanor.5California Legislative Information. California Penal Code 851.5
Cite and Release Instead of Jail
Not every misdemeanor arrest ends with a booking. Under Penal Code 853.6, when someone is arrested for a misdemeanor and does not demand to be taken before a judge, the officer is supposed to issue a written notice to appear in court and release the person.6California Legislative Information. California Penal Code 853.6 Cite-and-release is the default for misdemeanor arrests made under Penal Code 836, not an exception.
An officer can decline to release you when specific circumstances apply:
- You are too intoxicated to be safe on your own.
- You need medical attention or cannot care for yourself.
- There are outstanding warrants for your arrest.
- You cannot provide satisfactory proof of identity.
- There is a reasonable likelihood the offense will continue or that releasing you would endanger someone’s safety.
- Immediate release would jeopardize prosecution.
When an officer decides not to release you, the officer must document the specific reason on a form.6California Legislative Information. California Penal Code 853.6 The paperwork requirement exists because cite-and-release is supposed to be the norm and holding someone in custody is the exception.
Challenging a Warrantless Arrest That Went Beyond the Rules
Getting Evidence Thrown Out
The Fourth Amendment protects against unreasonable searches and seizures and requires probable cause for warrants.7Library of Congress. U.S. Constitution – Fourth Amendment When a warrantless arrest violates that standard, evidence obtained as a result can be excluded. Under Penal Code 1538.5, a defendant can file a motion to suppress any evidence obtained through an unreasonable search or seizure, including evidence found during or after an unlawful arrest.8California Legislative Information. California Penal Code 1538.5 If the court grants the motion, that evidence cannot be used against you at trial. Cases that looked strong on the street often collapse at this stage when a judge finds the officer lacked probable cause.
Suing for Damages
Beyond the criminal case, you may have civil remedies. Under 42 U.S.C. Section 1983, a person whose constitutional rights were violated by a government official acting under color of law can sue for damages.9Office of the Law Revision Counsel. 42 U.S. Code 1983 – Civil Action for Deprivation of Rights California’s Tom Bane Civil Rights Act creates a parallel state claim when someone interferes with constitutional rights through threats, intimidation, or coercion, with damages and attorney’s fees available.10California Legislative Information. California Civil Code 52.1
Officers are partially shielded by qualified immunity in federal Section 1983 claims, which lets a lawsuit proceed only if the officer violated a constitutional right that was “clearly established” by existing case law. That is a high bar. Penal Code 847 also protects officers from civil liability for false arrest when the arrest was lawful, or when the officer had reasonable cause to believe it was lawful at the time.11California Legislative Information. California Penal Code 847 For most people facing charges, the motion to suppress is the more immediately useful tool, because it goes directly to whether the criminal case can survive.