Expert participation in criminal proceedings

The scientific article is devoted to determining the legal status of an expert in criminal proceedings and problematic issues related it. development becoming began ancient times covered by various acts.
 This considers formulations definition expert. These make it possible identify main features that inherent person. It concluded most accurate complete can be considered legislative expert, which contained Art. 69 Criminal Procedure Code Ukraine. Emphasis placed on lack pre-defined force expert's finding.
 To properly understand concept discussion issue category "special knowledge" analyzed, interpretation missing regulations peculiarities special knowledge importance ways acquire them are indicated.
 In addition, considerable attention paid expert’s personality, as helps determine his status. Therefore, capacity a participant tort capability.
 Despite possibility using finding procedural source evidence, there number issues, reflected implementation right appeal actions person leads case violates rights; complexity procedure for gathering proofs defense conducting certain investigative actions, includes involvement expert; list grounds procedures involving inability engage expert.
 results emphasize need improve legislation appropriate direction, will participation more effective.