Many of us enjoy watching crime scene investigation shows, but in the criminal justice system, forensic investigation is a vital field that requires honest observations and prodigious interpretation. In forensic science, it is difficult to blame someone without scientific data. For this reason, Larry K. Gaines, author of the textbook Criminal Justice in Action, explains the importance of blood spatter analysis. Specialists can learn a lot about violent crimes by examining where the blood landed at the scene, the size and consistency of the drops, and the pattern of the blood spatter (Gaines, 2011). Therefore, a Blood Spatter Analysis article will be used to explain the research methodology that the author uses to conduct certain investigations. Originally the source used to discuss research methodologies and application for evaluating blood spatter evidence is Bloodstain Analysis with an Introduction to Crime Scene Reconstruction by Tom Bevel. In a brief explanation, the expert describes the involvement of criminal and forensic investigations. Additionally, The Blood Pattern Analysis explains a proven methodology that uses the scientific method and provides direction and structure to the analyst as they perform the analysis (Bevel, 2008). The scientific method is a form of quantitative data according to Peter B. Kraska, author of the textbook Criminal Justice and Criminology Research Methods. Quantitative data includes experiments, surveys/interviews and non-reactive methods; each has been examined in detail, accompanied by real-world examples of research in criminal justice theory and practice (Kraska, 2008). A step further with the scientific method, analyzing the patterns of bloodstains establishes a key to finding the event...... middle of article ......this leads to explain the methodology of the scientific method and provides the proper structure of how blood spatter analysis works. Quantitative research has shown that using scientific methodology can help us get one step closer to identifying a homicide like the one explained in the video tutorial. Finally, Bevel's expert gave an exclusive explanation on how the scientific method provides the analyst with a good source of help in identifying blood spatter analysis with different variables and valid information. Works CitedBevel, T. (2008). Analysis of bloodstain patterns with an introduction to crime scene reconstruction. New York: Taylor & Francis Group, LCC. Gaines, L.K. (2011). Criminal justice in action. Belmont, CA: Cengage Learning. Kraska, P. B. (2008). Research methods in criminal justice and criminology. Boston: Pearson Education .