Lesser Included Offense

A lesser included offense is a smaller crime that is automatically built into a larger one. To prove the bigger crime, the prosecution has to prove the smaller crime first — which means a jury that has doubts about the bigger charge can still find the defendant guilty of the smaller one. For example, simple assault is a lesser included offense of assault with a deadly weapon.

How Lesser Included Offenses Work in California

California uses two tests to identify lesser included offenses. Under the “elements” test, an offense is necessarily included when every element of the lesser is also an element of the greater. Under the “accusatory pleading” test, an offense is included when the language used to charge the greater offense necessarily includes the lesser. Both tests trace back to People v. Birks and have been refined through years of California case law.

Penal Code § 1159 specifically allows a jury to find the defendant guilty of any offense necessarily included in the offense charged. Trial judges have a sua sponte duty — meaning even without a request from the parties — to instruct the jury on lesser included offenses when there is substantial evidence supporting them. The leading case, People v. Breverman, established that failing to give a required lesser-included instruction can be reversible error in California.

Why Lesser Included Offenses Matter to Your Defense

Lesser included instructions can be lifesavers in a close case. Without them, a jury that is not convinced of the major charge but believes some crime occurred faces a hard choice — convict on the major charge or acquit completely. With them, the jury has a middle ground that often results in a substantially less serious conviction. A skilled criminal defense attorney identifies every plausible lesser included offense and fights to ensure the jury is instructed on it.

The strategy is not always to ask for them. In some cases, the defense may want to force the jury into an all-or-nothing decision — particularly when the prosecution’s evidence on the greater offense is weak. This is a careful judgment call that depends on the strength of each charge and the likely jury reaction. Either way, the decision must be deliberate.

Related Legal Terms

Lesser included offenses interact with the broader rules around jury instructions, charging through an information or indictment, and strategic decisions about a plea bargain. They appear regularly in our criminal defense and violent crimes work.

Facing Charges Where This Applies?

If you are charged with a serious offense in California, the lesser included offenses available to your case may dramatically affect what the jury can do — and what realistic outcomes look like. Attorney Chris Nalchadjian offers free, confidential consultations 24/7. Call KN Law Firm at (888) 950-0011.