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 when a specific misdemeanor exception applies, most importantly for domestic violence, violations of a protective order, DUI tied to a crash, and certain concealed-firearm offenses in airport security areas.1California Legislative Information. California Penal Code 836 Everything else about warrantless arrests in California — what officers must tell you, how fast you have to see a judge, and how to challenge the arrest later — flows from that framework.
Arrests for Offenses the Officer Sees
The baseline rule under 836 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 broader than it sounds. It covers anything the officer perceives through any sense. Seeing someone shoplift counts. So does hearing a fight, or smelling marijuana smoke in a no-smoking zone. The officer doesn’t have to have watched the entire offense unfold, but the officer has to have perceived enough of it personally.
This is also where the biggest practical limit on police arrest power lives. When an officer arrives after a misdemeanor has already ended and nobody there is an officer who witnessed it, the officer generally cannot arrest without a warrant. The usual path is to take a report, investigate, and go to a judge for a warrant. The misdemeanor exceptions below are narrow carve-outs from exactly this rule.
Warrantless Felony Arrests
Felonies work very differently. An officer does not need to witness a felony to arrest you for one, and 836 authorizes warrantless felony arrests on two separate grounds.
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 turns out no felony actually happened.1California Legislative Information. California Penal Code 836 Probable cause means specific, articulable facts that would make a reasonable person suspect a crime was committed. It’s less than certainty but more than a hunch.
The second ground is that a felony was actually committed and the officer has reasonable grounds to believe you were the person who committed it, even though the officer didn’t see it happen.1California Legislative Information. California Penal Code 836 This ground usually matters after the fact, when a court is sorting out whether an arrest held up.
The upshot: for felonies, the “presence” requirement doesn’t apply. Officers investigating a serious crime hours or days after it happened can arrest a suspect based on evidence gathered during the investigation, without stopping to get a warrant first.
Misdemeanor Exceptions Where the Officer Didn’t See the Crime
The legislature has written several specific exceptions into 836 and related statutes. Each one targets a situation where waiting for a warrant would risk someone’s safety or let evidence vanish. These are not general exceptions. They are tightly defined.
Domestic Violence
If an officer has probable cause to believe you committed an assault or battery against a current or former spouse, a cohabitant, a dating partner, a co-parent, or certain other family members, the officer can arrest you without a warrant even though the violence happened before the officer got there.1California Legislative Information. California Penal Code 836 The reasoning is that domestic situations can reignite fast, and sending the officer away to get a warrant would leave the victim exposed. A parallel provision extends this authority to assaults or batteries against on-duty firefighters and paramedics.
Violating a Protective Order
Protective-order violations go further. When an officer responds to a reported violation and has probable cause to believe you knew about the order and violated it, the officer is required to arrest you without a warrant.1California Legislative Information. California Penal Code 836 This is mandatory, not discretionary. It applies to restraining orders issued under California law and to orders issued by courts of other states or by tribal courts. Notice of the order can be shown by proof of service, confirmation from authorities, or evidence that you were present at the hearing where the order was granted.
DUI After a Traffic Crash
Vehicle Code 40300.5 authorizes a warrantless arrest when an officer has reasonable cause to believe you were driving under the influence and any of several conditions is met: you were in a traffic crash, you’re found near a vehicle blocking a roadway, you might flee if not arrested immediately, you pose a risk of injury or property damage, or you might destroy evidence.2California Legislative Information. California Vehicle Code 40300.5 Officers who show up to a DUI crash obviously didn’t see anyone driving. Without this provision they’d be stuck under the general presence rule and unable to arrest.
Concealed Firearms in Airport Security Areas
Officers can arrest without a warrant for a concealed-firearm violation under Penal Code 25400 when the violation occurs inside an airport’s access-controlled security area and the officer has reasonable cause to believe you committed the violation.1California Legislative Information. California Penal Code 836 This is narrow. It applies to the airport security zone, not to carrying firearms in public more generally.
What Must Happen After the Arrest
Section 836 says when officers can arrest. Other statutes set the rules for what has to happen next, and those rules matter if you want to know whether your rights were respected.
Being Told Why
Under Penal Code 841, the arresting officer has to tell you three things: that an arrest is happening, the reason for the arrest, and the authority under which it’s being made.3California Legislative Information. California Penal Code 841 This can be skipped only in narrow circumstances: you’re actively committing the crime, you’re being chased right after committing one, or you’re fleeing after an escape. If you ask what offense you’re being arrested for, the officer must answer.
Cite and Release for Misdemeanors
Not every warrantless misdemeanor arrest ends in jail. Under Penal Code 853.6, when you’re arrested for a misdemeanor and you don’t demand to be taken before a judge, the officer is directed to issue a written notice to appear in court and release you rather than booking you into custody.4California Legislative Information. California Penal Code 853.6 That’s the default for arrests made under 836. Officers can hold off on release in specific situations, including:
- You’re too intoxicated to be safe on your own.
- You need medical attention or can’t care for yourself.
- You have other outstanding arrest warrants.
- You can’t provide satisfactory proof of identity.
- There’s a reasonable likelihood the offense will continue or that releasing you would endanger someone.
- Immediate release would jeopardize prosecution.
When an officer decides not to release you, the officer has to document the specific reason on a form. The paperwork requirement exists because custody, in this setting, is the exception that needs justification.
Phone Calls
Once you’re booked, 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.5California Legislative Information. California Penal Code 851.5 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’re a custodial parent responsible for a minor child, you get two additional calls to arrange care. These rights apply regardless of immigration status, and an officer who willfully denies them is guilty of a misdemeanor.
The 48-Hour Rule
You must be brought before a judge without unnecessary delay and, in any event, within 48 hours of arrest, not counting Sundays and holidays.6California Legislative Information. California Penal Code 825 If the 48 hours expire when the court isn’t in session, the deadline extends to the next court session. The arraignment is when you’re formally told the charges, bail is set, and you can request an attorney. Holding someone past this window without bringing them to court violates California law.
Challenging an Arrest Made Under Section 836
If an officer arrested you without a warrant and you don’t think 836 or one of the related statutes actually authorized it, the most useful move in your criminal case is usually a motion to suppress. Under Penal Code 1538.5, you can ask the court to throw out any evidence obtained through an unreasonable search or seizure, including evidence gathered during or after an unlawful arrest.7California Legislative Information. California Penal Code 1538.5 The underlying standard comes from the Fourth Amendment, which protects against unreasonable searches and seizures and requires probable cause for warrants.8Library of Congress. U.S. Constitution – Fourth Amendment If the judge agrees the officer lacked probable cause or acted outside what 836 permits, the suppressed evidence can’t be used against you at trial, and the prosecution’s case often falls apart.
Civil remedies exist alongside the criminal case. Federal law, 42 U.S.C. Section 1983, allows a lawsuit for damages when a government official violates your constitutional rights.9Office of the Law Revision Counsel. 42 U.S. Code 1983 – Civil Action for Deprivation of Rights California’s Tom Bane Civil Rights Act provides a parallel state claim with damages and attorney’s fees.10California Legislative Information. California Civil Code 52.1 Both have real hurdles. Federal officers get qualified immunity, meaning the lawsuit can go forward only if the officer violated a right that was “clearly established” by existing case law. And Penal Code 847 shields 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, suppression is the more immediately useful tool, because it directly affects whether the criminal case survives.