Lesser included offenses can be an important part of a criminal jury trial. Some offenses, like misdemeanor DWI, don’t have any lesser included offenses. Others, like Aggravated Assault, are full of lesser included opportunities.
What is a lesser included offense? Let’s take an aggravated assault case. The difference between an aggravated assault (felony) and a misdemeanor assault is “serious bodily injury”. Aggravated assaults require that someone suffer a serious bodily injury, where misdemeanor assault just require some injury. So if you are on trial for aggravated assault, and you want to argue over whether the injury was “serious”, then you can ask that the jury be allowed to consider the lesser included offense of assault. That means, instead of just deciding if the defendant is guilty or not guilty of aggravated assault, the jury could consider finding the defendant guilty of only a misdemeanor assault. Confused? That’s ok, this isn’t an exciting topic for the lay person.
This being Texas, we do all sorts of mental gymnastics to uphold convictions on appeal. So if you want to appeal a conviction because the trial judge would not allow a lesser included instruction, here is how the court will decide that issue (spoiler alert, they will rule against the Defendant, but this is how they will rule against the Defendant).