A lesser included offense is a crime which is proved by the same facts as a more serious crime. For example, a prosecutor may charge a person with armed robbery and if he fails to prove all the elements needed to convict the criminal on the armed robbery charge, the criminal may still be convicted on a lesser included offense of larceny, a less serious theft offense. A plea bargain will often give the accused the option of pleading guilty or no contest to a lesser included offense rather than face trial and possibly be convicted on a greater offense.
The following is an example of a state statute governing lesser included offense:
"An offense is an included one if:
(b) The court shall not charge the jury with respect to an included offense unless there is a rational basis for a verdict convicting the defendant of the included offense."