Under California criminal law, individuals arrested for an offense have key constitutional protections designed to prevent unlawful detention.

For in-custody misdemeanor defendants, California Penal Code 991 (PC 991) provides an essential legal remedy: an immediate probable-cause hearing at arraignment.

If the prosecuting agency fails to establish sufficient evidence, the presiding judge must dismiss the charges and order the defendant released.

This guide provides a comprehensive legal overview of PC 991 motions, including statutory requirements, probable cause standards, defense strategies, related statutes, and common questions.

Key Statutory Definitions

To properly understand a Motion to Dismiss under Penal Code 991 PC, it is helpful to define the core legal concepts involved:

• Arraignment: The initial court appearance following an arrest where a defendant is formally advised of the charges against them, informed of their constitutional rights, asked to enter a plea, and provided an opportunity to address bail or release conditions.

• Probable Cause: A state of facts that would lead a person of ordinary caution and prudence to believe, and conscientiously entertain an honest and strong suspicion, that a crime was committed and that the accused is guilty of that crime.

• In-Custody Status: The physical detention of a defendant who has not posted bail or been released on their Own Recognizance (OR) prior to or during their arraignment.

• Misdemeanor: A criminal offense under California law carrying a maximum penalty of up to 364 days in county jail and/or a fine (typically up to $1,000), distinctly separate from a felony.

Legal Definition (Statutory Text)

The precise legal framework for a probable cause determination at a misdemeanor arraignment is set forth directly in the statute:

California Penal Code Section 991 PC:

(a) If the defendant is in custody at the time he is arraigned of the misdemeanor charge, and if the defendant pleads not guilty, the magistrate, on motion of counsel for the defendant or the defendant, shall determine whether there is probable cause to believe that a public offense has been committed and that the defendant is guilty thereof.

(b) The determination of probable cause shall be made immediately, unless the court, for good cause shown, continues the matter for a period of time not to exceed three days. In no event shall the defendant be detained in custody beyond the time allowed for the arraignment.

(c) In determining the existence of probable cause, the magistrate may consider any warrant of arrest with supporting affidavits, and any police report or sworn statement submitted by the informant or complaining witness.

(d) If the magistrate determines that there is probable cause to believe that the defendant has committed the offense charged in the complaint, the court shall hold the defendant to answer the same and shall set the matter for trial.

(e) If the magistrate determines that there is not probable cause to believe that the defendant has committed the offense charged in the complaint, the court shall dismiss the complaint and order the release of the defendant.

What the Defense Must Establish to Win the Motion

To successfully obtain a dismissal under PC 991, the defense attorney must demonstrate that:

1. Custody Requirement: The defendant is currently detained (in custody) on the misdemeanor charge at the time of arraignment.

2. Procedural Trigger: The defendant has entered an official plea of Not Guilty.

3. Lack of Probable Cause: The charging documents, police reports, or sworn affidavits—even when taken at face value—fail to show a reasonable suspicion that:

   • A public offense (crime) was actually committed, OR

   • The specific defendant committed it.

What the Prosecution Must Show to Defeat the Motion

To keep the charges active, the prosecutor must present written documentation (such as the arresting officer's incident report) containing facts sufficient to meet the minimal burden of probable cause.

Important Standard: The probable cause threshold is significantly lower than "beyond a reasonable doubt." However, if the police report is completely silent on a required legal element of the crime or lacks basic identification evidence, the judge must grant the motion.

Outcomes of a PC 991 Motion

The judge's ruling directly determines the legal status of the misdemeanor complaint and the defendant's immediate liberty.

1. If the Motion is Granted

If the judge determines that the arrest records fail to establish probable cause, the motion is granted, leading to the following immediate results:

• Immediate Case Dismissal: The magistrate formally dismisses the misdemeanor complaint against the defendant.

• Immediate Release: The court orders the defendant to be released from custody without delay.

• 15-Day Refiling Window: The ruling does not automatically bar future prosecution on the first attempt. The prosecution has a 15-day statutory window to refile the misdemeanor complaint if they obtain additional supporting evidence.

• The "Two-Dismissal" Rule: If the prosecutor refiles the exact same misdemeanor charge and a judge dismisses it a second time under PC 991, that second dismissal creates a permanent legal bar to any future prosecution for that specific conduct.

2. If the Motion is Denied

If the judge finds that the police report or affidavit contains sufficient facts to meet the low threshold of probable cause:

• Case Continuation: The criminal proceedings continue, and the case is set for future pre-trial hearings or trial.

• Custody & Bail Review: The defendant remains subject to the court's custody conditions, though their attorney may separately request an Own Recognizance (OR) release or a reduced bail amount.

• Preservation of Future Defense Motions: A denied PC 991 motion does not prevent the defense from challenging the evidence later. The defense attorney can still file subsequent evidentiary motions, such as a Motion to Suppress Evidence (PC 1538.5) or challenge the charges at trial before a jury.

Defense Strategies for a PC 991 Motion

A skilled defense attorney evaluates the prosecution's initial filing packet to identify critical gaps in the record. Key strategic approaches include:

• Highlighting Missing Legal Elements: Demonstrating that the facts outlined in the police report do not satisfy every required element of the alleged offense (e.g., in a DUI charge, showing the report fails to establish the defendant was actually driving).

• Challenging Unsubstantiated Hearsay or Vague Statements: Pointing out where officers relied on pure speculation or uncorroborated third-party statements rather than articulable facts.

• Identity Deficiencies: Establishing that the report fails to adequately connect the specific defendant in custody to the individual described by witnesses at the scene.

• Unlawful Search and Seizure Issues: Arguing that the underlying observations in the police report were derived from a blatantly illegal detention or warrantless search, rendering the evidence unusable for establishing probable cause.

Hypothetical Examples

• Example 1 (Missing Element of the Offense): A defendant is arrested in custody for Misdemeanor Trespass (PC 602). The police report indicates the defendant was standing on a commercial property during normal business hours but contains no facts showing they were ever asked to leave or that "No Trespassing" signs were posted. Defense counsel files a PC 991 motion at arraignment. The judge grants the motion and orders immediate release because the report fails to show a required element of trespassing.

• Example 2 (Insufficient Identification): A defendant is detained in custody for Petty Theft (PC 484) after an officer stops someone wearing a black jacket three blocks away from a store where a theft occurred. The police report acknowledges the store clerk could not identify the suspect's face and no stolen items were found on the defendant. At arraignment, the judge grants the PC 991 motion because there is no probable cause linking the defendant to the crime.

• Example 3 (Motion Denied on Basic Evidence): A defendant in custody for Misdemeanor Battery (PC 242) claims self-defense. The police report includes a victim statement alleging the defendant struck them unprovoked, alongside officer observations of facial red marks. Even though the defense argues self-defense, the judge denies the PC 991 motion because the report contains sufficient initial facts to establish basic probable cause. The issue of self-defense must be litigated later at trial.

Related Laws

Understanding related criminal procedure rules helps defendants navigate how early motions interact with overall defense strategies.

• Penal Code 995 PC – Motion to Set Aside Information or Indictment: Matters because it serves as the felony equivalent of a PC 991 motion, allowing felony defendants to challenge a lack of probable cause following a preliminary hearing.

• Penal Code 977 PC – Defense Appearance by Counsel: Matters because it governs when a misdemeanor defendant may allow an attorney to appear on their behalf without physically attending court.

• Penal Code 1538.5 PC – Motion to Suppress Evidence: Matters because it allows the defense to exclude evidence obtained through unconstitutional searches, which often leads to dismissal if crucial evidence is thrown out.

• Penal Code 1382 PC – Right to a Speedy Trial: Matters because it establishes strict legal deadlines for when a misdemeanor case must be brought to trial following arraignment.

Frequently Asked Questions

Who qualifies to file a Penal Code 991 motion? To file a PC 991 motion, you must be charged with a misdemeanor offense, you must plead "Not Guilty," and you must actively remain in custody at the time of your arraignment.

Can I file a PC 991 motion if I posted bail or was released on my Own Recognizance? No. Penal Code 991 PC is strictly available to in-custody defendants. If you bonded out of jail or were released on OR prior to your arraignment, you cannot utilize this specific statutory motion (though your attorney can challenge the evidence through other pretrial motions).

How does a PC 991 motion differ from a PC 995 motion? A PC 991 motion applies exclusively to misdemeanor cases for in-custody defendants at the initial arraignment stage. A PC 995 motion applies to felony cases and is filed after a preliminary hearing.

Can the judge take extra time to decide a PC 991 motion? Yes, but only for a very limited duration. Under PC 991(b), the court must make the probable cause determination immediately unless the prosecution demonstrates "good cause" for a continuance, in which case the hearing can be delayed by a maximum of 3 calendar days.

Does a dismissal under PC 991 mean my case is permanently over? Not necessarily on the first dismissal. The prosecution has a 15-day statutory window to refile the misdemeanor complaint. However, if the refiled complaint is dismissed a second time under PC 991, California's "two-dismissal" rule permanently bars future prosecution for that conduct.

What evidence does the judge review during a PC 991 hearing? The judge typically reviews written documentation submitted at arraignment, including the arresting officer's police report, arrest warrant affidavits, and any sworn statements from complaining witnesses. Live witness testimony is generally not presented during a PC 991 hearing.

Consult with Experienced Los Angeles Defense Counsel

If you or a loved one has been arrested and remains in custody facing misdemeanor charges in Los Angeles County, swift legal intervention is critical. Exercising your right to a Penal Code 991 motion at arraignment can mean the difference between remaining in jail awaiting trial or securing an immediate dismissal and release.

At Cron, Israels & Stark, our seasoned criminal defense team thoroughly reviews every arrest report to identify procedural and evidentiary flaws from day one.

• Office Location: Los Angeles, CA

• Free Case Consultation: Call (424) 372-3112