Penal Code § 836 lists several grounds on which a California peace officer may arrest someone without a warrant. The ordinary officer-presence ground, two felony grounds and special grounds for certain protective-order, domestic-assault, airport-firearm and shoplifting incidents have different conditions. If you were arrested, compare the actual alleged offense and the officer’s account with the applicable subdivision. The statute authorizes an arrest in specified circumstances; it does not establish guilt, dictate release or automatically dismiss a charge if the arrest is disputed.
What are the ordinary grounds in subdivision (a)?
Subdivision (a) also permits an arrest under a warrant. Without one, its three general grounds are distinct:
| Section | What the statutory text requires | What to check in the case record |
|---|---|---|
| § 836(a)(1) | Probable cause to believe the person committed a public offense in the officer’s presence. | What conduct the officer says they personally observed, when, and which offense the account identifies. A later witness report does not, by itself, show that the officer observed the act. |
| § 836(a)(2) | The arrested person has committed a felony, although the officer did not see it happen. | The alleged felony and the facts connecting the person to it; do not mistake an unobserved misdemeanor for this branch. |
| § 836(a)(3) | Probable cause to believe the person committed a felony, “whether or not a felony, in fact, has been committed.” | The information the officer had at the time of arrest and the felony believed to have occurred. This short quotation is an excerpt from the current statute, not its full text. |
Read the complete official § 836 for the exact language. Subdivision (a) refers to peace-officer authority under Chapter 4.5 beginning with § 830; it is not a general arrest license for every person who works in security. A brief investigative detention, an arrest, a later booking and a prosecutor’s filing decision are different events. If the encounter began with a stop, the lawfulness of that stop needs its own analysis.
Which special grounds matter when an offense was not witnessed?
Do not assume every unobserved misdemeanor fits an exception. Sections 836(c)–(f) identify particular allegations and additional conditions:
| Ground | Conditions that matter |
|---|---|
| Qualifying domestic-violence protective-order violation, § 836(c) | When responding to a call alleging violation of a covered order, the officer must have probable cause that the restrained person had notice and violated it. If those conditions are met, the provision directs the officer to arrest and take the person into custody. The statute identifies ways notice can be established. Where mutual orders exist, its dominant-aggressor limitation matters. Compare the order, notice or service record and officer’s account rather than relying on the phrase “restraining order.” |
| Specified assault or battery, § 836(d) | For an alleged assault or battery against one of the relationships the provision lists, the officer needs probable cause. If using this warrantless-arrest ground, the officer must make the arrest as soon as that probable cause arises; the provision permits, rather than mandates, that arrest. The relationship and timing are both part of this exception. |
| Concealed-firearm offense at a controlled airport area, § 836(e) | This is limited to a suspected § 25400 violation in an airport area controlled by inspection of people and property, with an arrest as soon as reasonable cause arises. It is not an airport-wide rule for every offense. |
| Unwitnessed shoplifting, § 836(f) | For an alleged § 459.5 violation, the officer needs probable cause, an arrest without undue delay, and one of the listed circumstances: a sworn eyewitness statement, footage the officer observes, specified security-tagged goods inconsistent with personal use, or a confession to that officer. |
All four descriptions come from the current full § 836. Subdivision (b) concerns information officers give a domestic-violence complainant about a possible citizen’s arrest; it is not another standalone peace-officer warrantless-arrest ground. Other laws can create offense-specific authority, so § 836 should not be treated as the only possible source of an arrest power. For example, an unwitnessed DUI may raise separate Vehicle Code § 40300.5 questions. If that is the dispute, the firm’s unwitnessed-driving DUI guide addresses that separate situation.
What should you compare before drawing a conclusion?
Keep the citation, arrest or booking record, complaint if one was filed, and any court notice. Note the time and place of the alleged act and arrest; what the officer says they saw; what came from a witness, video or other source; and any warrant or special subdivision cited. If the police account invokes a protective order, get the order and notice/service record. If it invokes shoplifting, preserve the footage and exact source of the officer’s identification. An arrest report is the officer’s account, not a judicial finding.
Whether an arrest or related search can be challenged, and what remedy could follow, depends on law and facts beyond this statute. Do not assume a § 836 dispute alone ends the prosecution. For a pending criminal charge, the Law Offices of David S. Chesley can review the actual papers and discuss the next step. Contact the firm or call (800) 755-5174.