THE CONSTITUTION OF THE REPUBLIC OF COSTA RICA
TITLE IV - INDIVIDUAL RIGHTS AND GUARANTEES
ARTICLE 39. No one shall be made to suffer a penalty except for crime, unintentional tort or misdemeanor punishable by previous law, and in virtue of final judgment entered by competent authority, after opportunity has been given to the defendant to plead his defense, and upon the necessary proof of guilt.
Fair trial standards
Presumption of innocence
Rights during investigation - arbitrary arrest or detention and deprivation of liberty
Rights during trial - raise defences
EDIT.