Constitution of Bangladesh
PART III - FUNDAMENTAL RIGHTS
32. No person shall be deprived of life or personal liberty save in accordance with law.
(5) When any person is detained in pursuance of an order made under any law providing for preventive detention the authority making the order shall as soon as may be communicate to such person the grounds on which the order has been made and shall afford him the earliest opportunity of making a representation against the order:
Provided that the authority making any such order may refuse to disclose facts which such authority considers to be against the public interest to disclose.
(6) Parliament may by law prescribe the procedure to be followed by an Advisory Board in an inquiry under clause (4).]
Fair trial standards
Rights during investigation - informed of belief that crime has been committed
Rights during trial - raise defences
EDIT.