This book introduces the core concepts of bloodstain pattern analysis that help to understand and make independent contributions to crime scenes accurately. It presents a bridge between new research results and the practical work field of crime scene investigation in bloodstain pattern analysis, by showing and detailing reports of two different scenarios. The scenarios presented have an extensive description of gathered evidence and are diversified with real crime scene photography and sketches. This kind of case report is rare in scientific books, but the author, as a researcher, has permission from the authorities to present the cases. The book finally concludes with the main problems of modern bloodstain pattern analysis and discusses the way forward.