What is considered the crime of perjury in the state of Missouri? Simply stated, when a person makes a statement at an official proceeding while under oath as a witness he or she knows not to be the truth, it is considered perjury. Essentially, a witness tells a lie that has some connection to an investigation, lawsuit, or inquiry related to the official proceeding. If you have been accused of this criminal offense, it is important to know that prosecutors must prove that you intended to mislead the court by lying on the witness stand. If you remain silent or refuse to give a statement, or make a statement that is false without intentionally doing so such as in circumstances where you cannot remember or are legitimately confused, it is not considered perjury. Regardless, it is important to speak with a capable Kansas City criminal defense attorney who will fight to protect your legal rights and provide exceptional legal guidance. At The O'Connor Law Firm, our goal is to reach positive results for each client we represent.