California Criminal Procedure: Arrest Through Sentencing

California criminal procedure governs every phase of a criminal case from the moment a suspect is detained through the imposition of a sentence, drawing on the California Penal Code, the California Constitution, and federal constitutional guarantees. This page maps the structural mechanics of that process, identifies the legal thresholds at each stage, and explains where procedural rules create friction, discretion, or contested outcomes. Understanding this framework is foundational to interpreting how California's broader legal infrastructure operates, covered more fully in the conceptual overview of how the California and U.S. legal systems work.

• Definition and scope
• Core mechanics or structure
• Causal relationships or drivers
• Classification boundaries
• Tradeoffs and tensions
• Common misconceptions
• Checklist or steps (non-advisory)
• Reference table or matrix

Definition and scope

California criminal procedure is the body of rules that controls how the state investigates, charges, prosecutes, adjudicates, and punishes alleged violations of criminal law. Its primary statutory source is the California Penal Code (Cal. Penal Code § 1 et seq.), supplemented by the California Rules of Court promulgated by the Judicial Council of California and constrained by the Fourth, Fifth, Sixth, and Fourteenth Amendments to the U.S. Constitution as incorporated against the states.

Scope and coverage of this page: This page addresses California state criminal procedure only. It does not cover federal criminal prosecutions brought by the U.S. Department of Justice in the Northern, Eastern, Central, or Southern Districts of California, which operate under the Federal Rules of Criminal Procedure (28 U.S.C. App.). It does not address civil infractions adjudicated without incarceration potential, juvenile delinquency proceedings under the Welfare and Institutions Code (see California Juvenile Court System), or tribal court criminal jurisdiction (see California Indigenous Tribal Law Intersections). Immigration consequences of criminal convictions, while triggered by state convictions, are governed by federal law and are addressed separately at California Immigration Law Intersection.

The procedural framework covered here applies to felonies, misdemeanors, and "wobblers" — offenses the prosecution may charge as either — prosecuted in California Superior Courts. For a breakdown of how criminal and civil tracks differ, see California Civil vs. Criminal Law Distinctions.

Core mechanics or structure

California criminal procedure moves through eight discrete phases, each governed by specific statutory and constitutional rules.

1. Arrest and detention. A peace officer may arrest without a warrant when the officer has probable cause to believe a felony has been committed (Cal. Penal Code § 836). Misdemeanor warrantless arrests require the offense to have occurred in the officer's presence, with exceptions for domestic violence (§ 836(c)) and DUI. The arresting agency must arraign the defendant within 48 hours of arrest, excluding weekends and holidays, per County of Riverside v. McLaughlin, 500 U.S. 44 (1991).

2. Booking and initial appearance. Booking records biometric data, charges, and property. At the initial appearance, the court determines custody status and bail eligibility. California Penal Code § 1269b governs bail schedules; each county Superior Court maintains a local schedule that sets presumptive bail amounts by offense.

3. Arraignment. The formal arraignment under Cal. Penal Code § 988 requires the defendant to be informed of charges and to enter a plea. Three pleas are available: guilty, not guilty, and no contest (nolo contendere). Most defendants enter not guilty at arraignment regardless of ultimate intent.

4. Preliminary hearing (felonies). For felony charges, the defendant is entitled to a preliminary hearing within 10 court days of arraignment if in custody (Cal. Penal Code § 859b). The magistrate applies a probable cause standard — lower than proof beyond a reasonable doubt — to determine whether the case proceeds. Defendants may alternatively waive the preliminary hearing and proceed directly to Superior Court.

5. Grand jury indictment (alternative to preliminary hearing). Under California Constitution Article I, § 14, a felony may be prosecuted by grand jury indictment rather than by information following a preliminary hearing. Grand juries in California consist of 23 members; an indictment requires concurrence of at least 12 (Judicial Council of California, Grand Jury).

6. Pre-trial motions. Motions under Cal. Penal Code § 1538.5 (suppression of unlawfully obtained evidence), § 995 (dismissal for insufficient evidence at preliminary hearing), and § 1054 et seq. (discovery) shape the evidentiary record before trial. California's evidence rules, governed by the California Evidence Code (Cal. Evid. Code § 1 et seq.), apply at trial. For a deeper treatment of evidence principles, see California Evidence Law Principles.

7. Trial. Defendants have a constitutional right to jury trial for offenses carrying more than 6 months' incarceration (Duncan v. Louisiana, 391 U.S. 145 (1968)). California juries consist of 12 members, and verdicts must be unanimous (Cal. Const. Art. I, § 16). The prosecution bears the burden of proof beyond a reasonable doubt. Trial procedure, including voir dire, is governed by the California Rules of Court (Rules 4.100–4.230).

8. Sentencing. Upon conviction, the court imposes sentence under the Determinate Sentencing Law (DSL), Cal. Penal Code § 1170 et seq. The DSL provides low, middle, and high terms for most felonies; judges select among the three unless aggravating or mitigating factors are found. Life sentences and death penalty cases follow separate statutory schemes under Cal. Penal Code §§ 190–190.9. For context on how courts fit within California's overall structure, see California Superior Court Jurisdiction.

Causal relationships or drivers

The procedural timeline is driven by three primary forces: constitutional minimums, statutory deadlines, and resource constraints at the county level.

Constitutional triggers. Gideon v. Wainwright, 372 U.S. 335 (1963), requires appointment of counsel for indigent defendants facing incarceration. California implements this through county public defender offices and contracted panel attorneys. The Sixth Amendment's speedy trial guarantee is operationalized in California by Cal. Penal Code § 1382, which requires that a defendant in custody be brought to trial within 60 days of arraignment on the information or indictment.

Charging discretion. The district attorney's charging decisions — particularly the choice to charge a wobbler as a felony or misdemeanor — materially affect which procedural path applies. Felony charges trigger preliminary hearings, grand jury options, and longer statutory timelines. Misdemeanor charges proceed faster, typically resolving within 30–45 days in arraignment courts.

Plea bargaining volume. Data from the California Department of Justice's Criminal Justice Statistics Center consistently shows that more than 90 percent of criminal convictions statewide result from guilty pleas rather than verdicts. This volume means that plea negotiation mechanics — not trial procedure — determine the operational rhythm of most criminal courts.

Classification boundaries

California criminal offenses fall into three categories that determine procedural paths:

• Felonies: Punishable by state prison (16 months to life). Require preliminary hearing or grand jury indictment. Governed by Determinate Sentencing Law or specific statutory schemes.
• Misdemeanors: Punishable by up to 364 days in county jail (amended from 365 days by SB 1310 (2014) to avoid federal immigration consequences). No preliminary hearing required. Arraignment to trial within 30–45 days.
• Wobblers: Charged as either felony or misdemeanor at prosecutorial discretion. Courts may reduce a wobbler felony to a misdemeanor at sentencing under Cal. Penal Code § 17(b).

Infractions, while listed in the Penal Code, are not crimes and carry no jail time. They follow a civil-style administrative track and are excluded from criminal procedure.

Tradeoffs and tensions

Bail reform vs. public safety. California passed SB 10 in 2018 to eliminate cash bail, replacing it with risk assessment tools. Voters rejected SB 10 at the November 2020 ballot (Proposition 25 failed, 56.4% to 43.6% (California Secretary of State, November 2020 General Election Results)). The underlying tension between pretrial detention as a public safety tool and the constitutional presumption of innocence remains unresolved in California policy.

Speedy trial rights vs. complexity. Defendants routinely waive their § 1382 speedy trial rights to allow more preparation time. This waiver practice, while constitutionally permissible, creates backlogs — particularly in large counties — that undermine the rule's purpose.

Determinate sentencing uniformity vs. judicial discretion. The DSL was designed to reduce sentencing disparity, but the three-tier structure (low, middle, high) still grants judges meaningful discretion. Cunningham v. California, 549 U.S. 270 (2007), held that California's former presumptive middle-term scheme violated the Sixth Amendment; the Legislature responded by amending § 1170 to restore judicial discretion in selecting among terms.

Plea bargaining pressure. When the sentencing differential between pleading guilty and going to trial is large (sometimes 10 or more years), defendants face structural coercion that critics argue compromises the voluntariness of pleas, while supporters contend the system cannot function at trial volume for all charged cases.

Common misconceptions

Misconception: Miranda rights must be read at arrest. Miranda v. Arizona, 384 U.S. 436 (1966), requires warnings only before custodial interrogation, not at the moment of arrest. Evidence obtained without Miranda warnings is excludable only if the defendant was in custody and subject to questioning without prior advisement.

Misconception: A preliminary hearing determines guilt. The probable cause standard at a preliminary hearing is substantially below "beyond a reasonable doubt." A magistrate's holding order means only that sufficient evidence exists to proceed — not that the defendant is likely guilty.

Misconception: Bail is always available. California Penal Code § 1270.5 lists offenses — including certain capital crimes and murder with special circumstances — for which bail is prohibited. Additionally, courts may deny bail if the defendant poses a demonstrated flight risk or danger to the community under applicable statutory findings.

Misconception: "No contest" and "guilty" pleas produce identical outcomes. Both pleas result in conviction for criminal purposes, but a no contest plea, unlike a guilty plea, cannot be used as an admission in a subsequent civil proceeding (Cal. Penal Code § 1016(3)).

Misconception: The prosecution must disclose all evidence before trial. California's criminal discovery statute (Cal. Penal Code § 1054.1) requires disclosure of specified categories of material, but disclosure timelines and specifics differ materially from civil discovery. Reciprocal defense disclosure obligations also apply under § 1054.3. Broader background on how legal terminology shapes these concepts appears in California and U.S. Legal System Terminology and Definitions.

Checklist or steps (non-advisory)

The following is a structural reference sequence describing stages in a California felony prosecution. It is descriptive, not prescriptive.

1. Arrest — Peace officer establishes probable cause; booking occurs at county facility.
2. 48-hour appearance — Court reviews probable cause determination (Cal. Penal Code § 991).
3. Arraignment — Charges read; plea entered; bail reviewed (Cal. Penal Code § 988).
4. Preliminary hearing or grand jury — Probable cause adjudicated; information or indictment filed.
5. Superior Court arraignment on information — New arraignment on the charging document as filed after preliminary hearing.
6. Pre-trial motions — § 1538.5 suppression motions, § 995 motions, discovery disputes.
7. Trial setting conference — Court sets trial date; speedy trial waiver assessed.
8. Jury selection (voir dire) — 12 jurors and alternates selected; challenges for cause and peremptory challenges exercised.
9. Trial — Opening statements, prosecution case-in-chief, defense case, closing arguments, jury instructions.
10. Verdict — Unanimous jury verdict required; hung jury results in mistrial.
11. Sentencing hearing — Probation report reviewed; aggravating and mitigating factors argued; DSL term selected.
12. Post-sentencing — Defendant may file notice of appeal to the California Court of Appeal within 60 days of judgment (Cal. Rules of Court, Rule 8.308). The appellate process is covered at California Appellate Court Process.

For rights specifically held by defendants throughout this sequence, see California Legal Rights of Defendants. The site's home directory provides access to all subject areas in this reference network. For regulatory context governing the agencies that enforce criminal law in California, see Regulatory Context for the California and U.S. Legal System.

Reference table or matrix

References

• California Penal Code — California Legislative Information
• California Evidence Code — California Legislative Information
• California Constitution, Article I — California Legislative Information
• Judicial Council of California — Grand Jury Information
• California Rules of Court — Judicial Council of California
• California Department of Justice, Criminal Justice Statistics Center
• California Secretary of State, November 2020 General Election Results
• [Miranda v. Arizona, 384 U.S. 436 (1966) — Library of Congress](https://www.loc.gov/item/usrep384436