CHAPTER III
FUNDAMENTAL RIGHTS
Article 21
f. Every person arrested or detained shall be formally charged and presented before a court of competent jurisdiction within forty-eight hours. Should the court determine the existence of a prima facie case against the accused, it shall issue a formal writ of arrest setting out the charge or charges and shall provide for a speedy trial. There shall be no preventive detention.
Fair trial standards
Rights during investigation - arbitrary arrest or detention and deprivation of liberty
EDIT.