Despite the changes they have undergone over time, acts of terrorism and, in particular, the ways in which they are committed have remained virtually the same, in fact, as the psychology of those who commit such acts. All acts of terrorism share a number of common features: first of all, they are characterized by the transnational, international nature of the attack and a pronounced physical and psychological aggression. Acts of terrorism are also usually characterized by their complex nature. The process of learning about these acts does not always have a corresponding finality. Prosecuting authorities often gather incomplete information and draw unjustified conclusions, incorrectly determine the direction of the investigation and make errors in the process of drafting their statements. However, knowledge of the criminal event must be obtained on the basis of the provisions determining the scope and limits of evidence in criminal cases and the forensic nature of the criminal act. In relation to the work of investigating acts of terrorism, success is guaranteed by the creative use of scientific knowledge in practical work, including forensic knowledge. Only under such conditions will the decisions taken be legal and well-founded, ensuring that the results correspond to the knowledge of objective reality. In connection with this, a proper examination of the forensic nature of the crime of terrorism and how it was committed is necessary.