A high-quality and qualified investigation of criminal offenses requires the investigator not only to acquire a significant amount of knowledge, the ability to combine knowledge and skills acquired during training in professional educational institutions, obtained during practical activities, but also to use the latest achievements of various sciences during the investigation. Investigating criminal offenses that combine two or more separate offenses in their mechanism of commission requires significant costs and effort. Manifestations of violence committed among persons who are related by family ties, are in an intimate relationship without marriage, or have been in a relationship for a certain time, had a common life, etc., combine the mechanisms of several criminal offenses.