Conn. Practice Book § 39-26 — Withdrawal of Plea; When Allowed

A defendant may withdraw his or her plea of guilty or nolo contendere as a matter of right until the plea has been accepted. After acceptance, the judicial authority shall allow the defendant to withdraw his or her plea upon proof of one of the grounds in Section 39-27. A defendant may not withdraw his or her plea after the conclusion of the proceeding at which the sentence was imposed.