This publication appeared in an attempt to describe the other, opposite legal, determining side of procedural actions. Since it is impossible to resist the enemy without knowing his tactics, we decided to study the literature intended for investigators and select the most important, in our opinion, points that explain how investigators extract the information they need from us, force us to confess, force us to testify against our comrades. It will be somewhat strange for you to read advice to investigators on applying psychological pressure, but then you will quickly learn the methods and techniques that were used on you or your friends. The book does not contain ready-made recipes for how to resist these techniques, but knowing them will help you clearly define your goal question, quickly navigate and make the right choice in your favor. This helps in the same way that knowing extra questions on an exam helps relieve stress before answering.