Abstract: The subject of this research is the public relations established in exercising of such a power by the prosecutor on detection of violations of laws outside the criminal law sphere as the right to demand from the policy makers and other officials “supervised” to the prosecutor's office the allocation of specialists. Findings of the experts in the material form are in demand among the law enforcement officers in different spheres of social life, including due to their evidentiary potential. The relevance of this research is defined by the fact that the scholars and practicing legal experts have accumulated a range of questions to the legal status of a specialist in the Russian legislation, which also pertains to the prosecutor's activity. The novelty consists in the author’s substantiation of the need to improve legal regulation of the corresponding legal relations based on comparison of the norms that regulate the mechanism of cooperation between specialists and prosecutors in supervision by the latter of compliance with laws, rights and freedoms of human and citizens, analysis of theoretical groundwork on the topic, and personal practical experience in the prosecutor's office. The article reveals the gaps in the existing legal regulation. This work may be valuable for the practitioners of the prosecutor's office, as well as bodies “supervised” to the prosecutor's office, scholars in the area of prosecutor's activity, legal experts, students, and postgraduates.