3.3 Defendant's Decision Not to Testify is a process by which a defendant in a criminal trial chooses not to testify in their own defense. This decision is a fundamental right that is protected under the Fifth Amendment of the United States Constitution. There are two types of Defendant's Decision Not to Testify: voluntary and involuntary. Voluntary Defendant's Decision Not to Testify is when the defendant chooses not to testify, while involuntary Defendant's Decision Not to Testify is when the defendant is prevented from testifying by the court. Generally, the defendant's decision to not testify can not be considered by the jury during their deliberations.