The basic criminological-tactical method for securing a memory trace in a person's consciousness continues to be the interrogation method, which has been theoretically developed from the perspective of criminological science. Based on research findings, the authors present partial findings to the professional public from the area of preparing police officers who apply the method in practice, so that it is clear what practice expects and proposes to improve police work based on criminological knowledge. The conclusions are supported by concrete findings from the questionnaire survey and structured interviews conducted by the authors in professional practice.