Jury Instructions

Jury instructions are the rules the judge reads to the jury before they go off to deliberate. They explain what the law actually requires for each charge, what the prosecution has to prove, and how the jury should think about things like witness credibility, reasonable doubt, and the defendant‘s right not to testify. They are, in many ways, the actual rulebook the jurors use to decide the case.

How Jury Instructions Work in California

California uses pattern jury instructions called CALCRIM, maintained by the Judicial Council. There is a CALCRIM instruction for every common charge, defense, and evidentiary issue — for example, CALCRIM 220 explains reasonable doubt, CALCRIM 224 explains how to evaluate circumstantial evidence, CALCRIM 315 addresses eyewitness identification, and CALCRIM 355 protects the defendant’s choice not to testify. Penal Code § 1093 and § 1127 govern how and when these instructions are given, and the judge generally must instruct on every theory supported by substantial evidence — including defense theories like self-defense, alibi, and insanity.

Both sides can request modifications or additional instructions through written submissions. The judge holds an instructions conference, often after the close of evidence, where the parties argue for and against specific language. Errors in instructions — giving an incorrect one, refusing a properly requested one, or failing to give one required by the evidence — are among the most common grounds for reversal on appeal in California criminal cases.

Why Jury Instructions Matter to Your Defense

Jury instructions are far more important than they look. The exact language jurors hear can swing a close case. A skilled criminal defense attorney studies the available CALCRIM instructions early, drafts proposed modifications when the standard language does not capture the defense theory, and preserves objections on the record for appeal. Failing to do this work can permanently waive issues that would otherwise win on appeal.

Defense-specific instructions are particularly powerful. Instructions on lesser included offenses can give the jury a path to a less serious conviction. Instructions on third-party culpability, mistaken identity, or voluntary intoxication can frame the entire case for jurors. The work to secure these instructions is one of the most underrated parts of California criminal trial defense.

Related Legal Terms

Jury instructions are part of the broader trial process that includes voir dire, the rules around evidence presentation, and the closing argument. They are shaped by foundational concepts like beyond a reasonable doubt and play a central role in our criminal defense and DUI defense practice.

Facing Charges Where This Applies?

If your case is heading to trial, the jury instructions your lawyer fights for can decide the outcome long before deliberations begin. Attorney Chris Nalchadjian offers free, confidential consultations 24/7. Call KN Law Firm at (888) 950-0011.