If a police investigation cannot be concluded within 24 hours of an arrest, what is the maximum initial period for which a Judicial Magistrate can authorize the detention of the accused in police custody?

Explanation

Under Article 22 of the Indian Constitution and procedural law, if an investigation cannot be finished within 24 hours, the Judicial Magistrate can authorize the detention of the accused in police custody for a maximum period of 15 days. If custody is extended beyond 15 days, the accused can only be kept in judicial custody, not in police custody.