Constitution of the Federal Republic of Nigeria 1999 (as amended)
Section 35(4) — Maximum Period of Pre-Charge Detention
“Any person who is arrested or detained in accordance with subsection (1)(c) of this section shall be brought before a court of law within a reasonable time, and if he is not tried within a period of — (a) one day where a court of competent jurisdiction is within forty kilometres; or (b) two days or such longer period as in the circumstances may be considered by the court to be reasonable, in any other case; he shall be released either unconditionally or upon such conditions as are reasonably necessary to ensure that he appears for trial at a later date.”
This section establishes the constitutional ceiling on pre-charge police detention. In the vast majority of Nigerian urban centres, where a magistrate court is within 40 kilometres, the limit is one day — 24 hours. Detention beyond this period without a charge or a court order is a fundamental violation of liberty, not a procedural irregularity. Each additional hour of unlawful detention is a continuing constitutional violation.
Administration of Criminal Justice Act 2015
Section 293 and Section 294 — Police Bail and Release from Custody
“Section 293: A suspect arrested for a non-capital offence shall be released on bail by the officer-in-charge of the police station at any time while the suspect is in custody. Section 294: Where a suspect is not released on bail under section 293, the officer in charge shall as soon as practicable bring the suspect before a Magistrate Court.”
These sections make police bail a right, not a privilege. For bailable offences — which include most everyday matters — the officer-in-charge has a duty to grant bail. The phrase 'still investigating' is not a lawful basis for denying that right. If the officer-in-charge refuses bail, they are personally in breach of a statutory duty, and the detainee must be brought before a magistrate without delay.