PART TWO
FUNDAMENTAL RIGHTS AND DUTIES
CHAPTER TWO
RIGHTS AND DUTIES OF THE INDIVIDUAL
III. Personal Liberty and Security
ARTICLE 19. (As amended on October 17, 2001)
Individuals arrested or detained shall be promptly notified, and in all cases in writing, or orally, when the former is not possible, of the grounds for their arrest or detention and the charges against them; in cases of offences committed collectively this notification shall be made, at the latest, before the individual is brought before a judge.
Rights during investigation - informed of belief that crime has been committed
Rights during trial - informed promptly and in detail of charges
EDIT.