According to the Rule of Criminal Procedure, what must happen to a defendant arrested on Sunday and not appearing before a magistrate until Tuesday due to a holiday?

In the context of the Rule of Criminal Procedure, if a defendant is arrested on a Sunday and does not appear before a magistrate until Tuesday due to a holiday, the proper action is for the defendant to be released immediately. This is grounded in legal principles that protect individuals' rights regarding prompt appearances before a magistrate following an arrest.

The legal framework typically establishes that an arrested individual must be brought before a magistrate without unnecessary delay, which often translates to within a specific time frame, usually 24 hours. However, if that window is extended due to circumstances like holidays, the defendant cannot be held indefinitely without a hearing. The requirement for the timely appearance before a magistrate is a fundamental safeguard against unlawful detention.

Thus, the correct answer reflects that the law prioritizes releasing individuals who have not been timely presented to a magistrate, ensuring that their rights are upheld in accordance with procedural regulations.