BULGARIA - PENAL PROCEDURE CODE
Part one. GENERAL RULES
Chapter seven. ACCUSED
Section II. Restraining Measure and Other Measures of Procedural Compulsion
Art. 65. (3) The case shall be set down for hearing within three-days period following its receipt into the court and shall be heard in open session with the participation of the prosecutor, the accused and his/her defender. The case shall be tried in the absence of the accused, if he/she states that he/she does not want to appear or his/her bringing before the court is impossible for health reasons.
Fair trial standards
Trials in absentia
Rights during investigation - arbitrary arrest or detention and deprivation of liberty
EDIT.