In this study, we consider a possible set of operations and actions of a forensic expert to investigate the actions of an under investigation/defendant in cases related to extremist articles. The article uses the experience of forensic expert practice carried out on the basis of the Decisions of the investigation or court. Modern research in the field of complex forensic psychological and linguistic expertise in cases of extremist orientation is faced with the problem of determining the motives of subjects who carry out actions that fall under the signs of articles of the Criminal Code of the Russian Federation of extremist orientation related to calls for extremist actions, propaganda of extremist and terrorist ideas, justifications of terrorism, as well as public actions, aimed at discrediting the use of the Armed Forces of the Russian Federation in order to protect the interests of the Russian Federation and its citizens, maintain international peace and security, or exercise their powers by state bodies of the Russian Federation for these purposes and other acts. Difficulties are primarily related to materials in which the place of commission of the offense is the social networks VKontakte, Odnoklassniki, Facebook, Instagram, Telegram, etc. In these cases, we often deal with such a specific communicative act as a repost. In the case of a repost, as a social action in social networks, the judicial investigation does not deal with the author of the text material, but with the subject who transferred this material to other persons, i.e., the subsequent placement of the material from the author on his electronic page on the social network. And here the court has a question: what is the target orientation of the defendant's actions? It can be an act of random, unmotivated action, but it can be a conscious and purposeful act.