This script is intended as an introduction to the fundamental topics of the Code of Criminal Procedure (StPO). It covers, among other things, the course and participants of the criminal proceedings, the procedural principles, and the appeals process. The name niederle media stands for scripts that are largely authored by individuals with several years of teaching experience as university lecturers or group leaders, presenting exam-relevant topics in a compact manner that can usually be worked through in 1-2 days, thus saving time. They are written in such a way that even beginners can easily understand them right away. The scripts include case studies, overviews, and diagrams, and are very affordable (starting from 7 EUR). Due to these qualities, our scripts are excellently suited for a first, uncomplicated introduction to the subject or for a quick review just before the exam.