What case supports the defendants rights to withdraw a plea after its been entered?

The case of North Carolina v. Alford (1970) supports defendants' rights to withdraw a plea after it has been entered. In this case, the U.S. Supreme Court held that a defendant could plead guilty while maintaining their innocence if it was strategically advantageous, but also established that defendants have the right to withdraw their plea if they can show that it was not made voluntarily or knowingly. Additionally, many jurisdictions allow plea withdrawal under certain circumstances, such as ineffective assistance of counsel or newly discovered evidence.