This summary is not the rule. The rule text controls.
# Rule 34: Arrest of Judgment
If a defendant is found guilty, they can ask the court to cancel or throw out that conviction under certain conditions. The court must agree to do this if either of two things is true: the original charges never actually described a real crime, or the court never had the legal authority to handle the case in the first place.
This request is called a "motion in arrest of judgment." The defendant has to make this request quickly. They only have seven days after being found guilty, or after pleading guilty or no contest, to file this motion. The court can extend this deadline, but only if it does so within that same seven-day window. Once the seven days pass without an extension, the defendant loses the chance to make this argument.
This rule protects defendants from being convicted when something was legally wrong from the start. It is not about whether the defendant actually committed the crime. Instead, it focuses on whether the charges were valid or whether the court even had the power to judge the case at all.