Which entity must demand an arrested person for custody to prevent their discharge from jail?

The correct answer focuses on the requirement that a designated authority take action to prevent the release of an arrested individual from custody. Under Texas law, specifically referencing the Code of Criminal Procedure, the appropriate county office, typically represented by the district attorney or a similar entity, must formally demand the individual for custody. This is necessary to ensure that the person does not inadvertently get discharged from jail due to a lack of timely processing or legal oversight.

In circumstances where an individual is arrested, if the prosecution wishes to hold them, it is essential for the appropriate county office to intervene promptly. This requirement safeguards against premature release, allowing the legal process to unfold properly and ensuring any necessary charges or proceedings can take place without unnecessary delays.

This responsibility does not rest with the mayor, who has no direct role in criminal prosecutions, nor with the arresting officer, whose role is primarily to execute the arrest and not to manage custody demands. While a magistrate who signed the arrest warrant plays a role in the judicial process, the specific demand to keep a person in custody is facilitated through the appropriate county office, emphasizing their crucial function in this context.