The material provides an analysis of cross-cutting issues of tactics of interrogation of persons with mental disorders; The author focuses on the fact that investigated the problem is quite complex in terms of legal, criminological, criminal law, medical-social and psychological aspects. The purpose of research - the study of tactical and procedural features of interrogation of persons with mental disorders. Methods. The methodological basis of the study constitute a universal method of knowledge, reflecting the dialectical relationship of theory and practice, as well as other proven methods of scientific research: the method of theoretical analysis of the sources of the problem, analysis and synthesis, induction and deduction, sociological, psychological and statistical methods (study and analysis of the content of the materials criminal cases and statistical data, questionnaires, survey). Results. Thus, analyzing the modern ideas of scientists and practitioners concerning the use of the terms "mental disorders", "mental illness", "mental deficiencies" and so on., We can conclude that it is more correct to use the term "mental disorder"; defects psyche available to all categories of persons under interrogation, it is a very complex and diverse phenomenon and should be the subject of study sciences such as criminal law, process, criminology, criminal law enforcement, forensic psychiatry and criminology; legal psychology.

Keywords: interrogation, interrogated category interrogated, mental disorders, mental defects, types of examination, symptoms of mental disorders, ability, disability