The California Evidence Code is the statutory rulebook that decides what a judge or jury in a California court is allowed to hear and consider. It governs both civil and criminal trials, and every item offered as proof has to clear the same set of gates: it must be relevant, it must be authenticated as what the offering party claims, and it must not fall under a hearsay bar, a privilege, or a discretionary exclusion. The code also assigns who has to prove what, and how convincingly.
Relevance Is the First Gate
Section 350 states the baseline: no evidence is admissible unless it is relevant.1California Legislative Information. California Code Evidence Code – Section 350 Section 210 defines relevant evidence as anything with a tendency in reason to make a disputed fact more or less probable.2California Legislative Information. California Code EVID 210 – Relevant Evidence The bar is deliberately low. Evidence does not have to prove a point on its own; it only has to move a contested issue.
Relevance alone is not enough. Section 352 lets a judge exclude even relevant evidence when its probative value is substantially outweighed by the risk of undue prejudice, jury confusion, or wasted time.3California Legislative Information. California Code Evidence Code 352 – Admitting and Excluding Evidence Graphic crime-scene photographs are the classic example: relevant to cause of death, but capable of overwhelming a jury’s reasoning. Attorneys raise Section 352 through pretrial motions in limine and through objections during trial, and trial courts have broad discretion in the call.
Who Has to Prove What
Section 500 places the burden of proof on the party asserting a claim or defense.4California Legislative Information. California Code EVID 500 – Burden of Proof Section 115 defines that burden as the obligation to establish a required level of belief in the mind of the trier of fact, and it recognizes three standards.5California Legislative Information. California Code EVID 115 – Burden of Proof The default in civil cases is preponderance of the evidence: more likely true than not. Certain civil claims, including fraud, require clear and convincing proof. Criminal convictions require proof beyond a reasonable doubt.
The standard shapes the case. Tipping the scales just past the midpoint is enough in an ordinary civil dispute. Eliminating reasonable doubt is a far steeper climb.
Types of Evidence and How They Come In
California courts see four main forms of evidence, each with its own admission requirements.
Testimonial evidence is a witness’s sworn statement in the proceeding. Section 702 requires that a witness testifying to a fact have personal knowledge of it.6California Legislative Information. California Code EVID 702 – Personal Knowledge of Witness Experts are the main departure from that rule.
Physical evidence is tangible: weapons, clothing, DNA samples, fingerprints. Before the jury can consider it, Section 1400 requires authentication, meaning the offering party must produce enough proof that the item is what they say it is.7California Legislative Information. California Code Evidence Code 1400 – Authentication of a Writing Chain-of-custody proof matters here because it addresses the risk of contamination or tampering.
Documentary evidence covers contracts, emails, police reports, and business records. California replaced its former best-evidence rule with the secondary evidence rule. Section 1520 allows the content of a writing to be proved by an admissible original, and Section 1521 permits secondary evidence unless there is a genuine dispute about material terms and justice requires exclusion, or admitting the secondary evidence would be unfair.8California Legislative Information. California Code Evidence Code – Proof of the Content of a Writing
Demonstrative evidence is visual: diagrams, models, animations that illustrate other evidence. In People v. Duenas (2012), the California Supreme Court upheld a computer animation used to illustrate an expert’s shooting-reconstruction opinion, finding no abuse of discretion where the animation accurately reflected the underlying testimony.9Justia. People v. Goldsmith (2014)
Authenticating Digital Evidence
Electronic files can be altered without visible traces, so authentication does real work here. Section 1552 creates a presumption that a printed representation of computer information accurately reflects the underlying data. It is a presumption affecting the burden of producing evidence, so if the opposing party puts on any evidence of inaccuracy, the proponent must then prove the printout is reliable.10California Legislative Information. California Code EVID 1552 – Printed Representation of Computer Information
Social media posts, emails, and text messages often need additional authentication such as metadata or testimony from someone who can confirm authorship. In People v. Goldsmith (2014), the California Supreme Court addressed authentication of automated red-light camera footage and held that firsthand knowledge of the underlying events is not required; a witness who can explain how the system works and vouch for its reliability is enough.9Justia. People v. Goldsmith (2014)
The Hearsay Rule and Its Main Exceptions
Section 1200 defines hearsay as an out-of-court statement offered to prove the truth of what it asserts, and it declares hearsay inadmissible except as provided by law.11California Legislative Information. California Code EVID 1200 – Hearsay Evidence The concern is that the person who made the statement was not under oath and cannot be cross-examined. California recognizes numerous exceptions where the circumstances make the statement reliable enough anyway.
Spontaneous Statements and Dying Declarations
Section 1240 admits a statement describing an event the speaker personally perceived, made spontaneously while still under the stress of that event.12California Legislative Information. California Code Evidence Code 1240 – Spontaneous, Contemporaneous, and Dying Declarations The idea is that someone reacting to a startling event has no time to fabricate. Section 1242 admits a dying declaration about the cause and circumstances of the speaker’s death, made from personal knowledge while the speaker believed death was imminent.13California Legislative Information. California Code Evidence Code 1242 – Evidence of a Statement Made by a Dying Person
Statements Against Interest
Section 1230 permits an out-of-court statement by a speaker who is now unavailable, when the statement was so damaging to the speaker’s financial, legal, or social interests that no reasonable person would have said it unless they believed it was true.14California Legislative Information. California Code Evidence Code 1230 – Declarations Against Interest
Business and Public Records
Section 1271 admits records of an act or event made in the regular course of business at or near the time of the event, when the sources and method of preparation indicate trustworthiness and a qualified witness testifies about identity and preparation.15California Legislative Information. California Code EVID 1271 – Business Records Section 1280 applies parallel logic to government records prepared by public employees within the scope of their duties.16California Legislative Information. California Code EVID 1280 – Record of Act, Condition, or Event
Former Testimony
Section 1291 allows testimony from an earlier proceeding when the witness is now unavailable, provided the party against whom it is offered had the right and opportunity to cross-examine the witness in that earlier proceeding with a similar interest and motive.17California Legislative Information. California Code Evidence Code 1291 – Former Testimony The earlier cross-examination substitutes for the safeguards trial normally requires.
Privileges That Keep Evidence Out
Privileges cut against the usual push to get relevant evidence to the jury; they exist to protect confidential relationships that the law values for their own sake.
Attorney-Client Privilege and Work Product
Sections 950 through 962 protect confidential communications between a lawyer and client made during the course of that professional relationship.18California Legislative Information. California Code Evidence Code 950 – Lawyer The privilege applies whether or not the communication contains formal legal advice.
Related but separate is the work product doctrine in Code of Civil Procedure Section 2018.030. An attorney’s written impressions, conclusions, opinions, and legal theories are absolutely protected from discovery. Other work product prepared in anticipation of litigation gets qualified protection and can be ordered disclosed only if the requesting party shows a need for the materials and an inability to obtain the equivalent through other means.19California Legislative Information. California Code of Civil Procedure 2018.030
Two Different Spousal Privileges
California recognizes two, and they are commonly confused. The testimonial privilege under Sections 970 through 973 lets a married person refuse to testify against their spouse in any proceeding, and it belongs to the witness-spouse.20California Legislative Information. California Code EVID 970 – Privilege Not to Testify Against Spouse It applies only during the marriage.
The confidential marital communications privilege under Section 980 is broader in one respect: it survives divorce. Either spouse can refuse to disclose, and can prevent others from disclosing, communications made in confidence during the marriage.21California Legislative Information. California Code Evidence Code 980 – Confidential Marital Communications
Medical, Mental Health, Clergy, and Journalist
The physician-patient privilege (Sections 990–1007) and the psychotherapist-patient privilege (Sections 1010–1027) shield confidential medical and mental health communications from compelled disclosure.22California Legislative Information. California Code Evidence Code 990-1007 – Physician-Patient Privilege The clergy-penitent privilege (Sections 1030–1034) protects confessions and spiritual guidance given to clergy during the practice of the faith.23California Legislative Information. California Code EVID – Clergy Penitent Privileges Section 1070, the journalist’s shield, protects reporters from being held in contempt for refusing to reveal confidential sources or unpublished newsgathering material.24California Legislative Information. California Code EVID 1070 – Immunity of Newsman From Citation for Contempt
Character Evidence and Prior Bad Acts
Section 1101(a) sets the general rule: character evidence is not admissible to prove that a person acted in accordance with that character on a particular occasion.25California Legislative Information. California Code EVID 1101 – Evidence of Character to Prove Conduct A reputation for dishonesty cannot be used to prove a specific fraud.
Section 1101(b) allows prior crimes or other acts when offered for something other than character, such as motive, opportunity, intent, preparation, plan, knowledge, identity, or absence of mistake. In People v. Ewoldt (1994), the California Supreme Court set out the framework courts still use: uncharged misconduct is admissible to show a common design or plan when the uncharged acts and the charged offense share enough common features to suggest they were part of the same scheme, with a greater degree of similarity required for plan than for intent, and all of it still subject to Section 352 balancing.26Justia. People v. Ewoldt (1994) Sections 1108 and 1109 create narrower exceptions that allow prior sexual offense and domestic violence evidence in prosecutions for those same categories of crimes, even when the evidence goes to propensity.
Witness Competency and Impeachment
Section 701 disqualifies a witness who cannot express themselves clearly enough to be understood or who cannot grasp the duty to tell the truth.27California Legislative Information. California Code Evidence Code – Division 6 – Witnesses Challenges of this kind are uncommon but do happen.
Credibility is a different question. Section 780 lists factors the jury may consider when weighing a witness’s truthfulness, including bias, prior inconsistent statements, and reputation for honesty.28California Legislative Information. California Code Evidence Code 780 – Credibility Generally Section 788 permits impeachment with felony convictions.29California Legislative Information. California Code EVID 788 – Attacking or Supporting Credibility In People v. Castro (1985), the California Supreme Court held that only felonies necessarily involving moral turpitude qualify, and the trial court retains Section 352 discretion to exclude even a qualifying conviction where prejudicial impact outweighs impeachment value.30Stanford Supreme Court of California. People v. Castro
Section 770 governs impeachment by prior inconsistent statement. Extrinsic evidence of the inconsistent statement is excluded unless the witness was given a chance during testimony to explain or deny it, or has not yet been excused and can still be recalled.31California Legislative Information. California Code Evidence Code 770 – Prior Inconsistent Statements
Expert Testimony
Experts help judges and juries with technical or specialized issues beyond common experience. Section 801 limits expert opinion to subjects sufficiently beyond everyday knowledge and requires that the opinion be based on matter reasonably relied upon by experts in the field.32California Legislative Information. California Code EVID 801 – Opinion Testimony by Expert Witness Section 802 allows the expert to state the basis for the opinion on direct examination, including specialized training and experience, and gives the court discretion to require that foundation before the opinion itself comes in.33California Legislative Information. California Code EVID 802 – Statement of Basis of Opinion Qualifying an expert requires showing relevant knowledge, skill, experience, training, or education, and opposing counsel can challenge those credentials on voir dire.
The Kelly Standard for Scientific Evidence
California does not use the federal Daubert standard for new scientific techniques. In People v. Kelly (1976), the California Supreme Court adopted the “general acceptance” test from Frye v. United States (1923).34Justia. People v. Kelly A new scientific technique must be generally accepted as reliable within the relevant scientific community before evidence derived from it can be admitted. In practice, California courts weigh scientific consensus more heavily and are more cautious about novel methods than federal courts applying Daubert‘s testability, peer review, and error-rate factors.
Judicial Notice
Some facts do not require testimony or exhibits. Section 452 lists categories of facts a court may judicially notice, including federal and state laws, regulations, court records, facts so widely known within the court’s jurisdiction that they cannot reasonably be disputed, and facts that can be immediately verified from unquestionable sources.35California Legislative Information. California Code Evidence Code 452 – Judicial Notice The day of the week a date fell on, published government interest rates, and the content of a public statute are typical examples.
Section 453 makes judicial notice mandatory when a party formally requests it, gives the opposing party enough notice to prepare a response, and provides the court with sufficient information to act.36California Legislative Information. California Code Evidence Code 453 – Compulsory Judicial Notice Facts established this way do not need a witness on the stand.
Proposition 8 and the Limit on Excluding Evidence in Criminal Cases
One boundary matters especially in criminal practice. Proposition 8, passed by California voters in 1982, added the Truth-in-Evidence provision now in Article I, Section 28(f)(2) of the California Constitution. It provides that relevant evidence cannot be excluded in a criminal proceeding except by a statute passed with a two-thirds vote of each legislative house.37California Legislative Information. California Constitution Article I Section 28 The provision expressly preserves privilege rules, hearsay rules, and Section 352 balancing, so the code’s core gatekeeping still applies. What it does narrow is state-law exclusion beyond what federal constitutional law requires: California criminal courts generally follow federal search-and-seizure standards rather than broader state-only protections. The Fourth Amendment and Article I, Section 13 of the California Constitution both continue to prohibit unreasonable searches and seizures.38Justia. California Constitution Article I Section 13