The Bloodstain Pattern Analysis On The Crime Scene

The blood is the scene of the crime on the trace of the common one, especially the homicide case, it can objectively reflect the process of case occurrence, reliable record crime. In the time of the victim or criminal just appear open injury, the blood will be left behind. Field exploration can be effectively analyzed using field blood form, maximize the role of the analysis, the direct impact on the homicide case detection and litigation activities smoothly. The exploration practice show that the method that USES science reading field blood contains crime information, cracking the case is one of the most important point, and even become the breach of the criminal detection, so this paper is focusing on how to complete the scientific interpretation of the scene of the crime blood form contains crime information to the topics.Morphological analysis papers always to blood as the main line runs through the full text. First discusses the development of bloodstain pattern analysis, comparative research status at home and abroad; Secondly study the rheological property of blood, surface tension, and relative density of three physical properties, and on this basis, analyzed the influence of the physical properties of the blood for blood formation; Again, in combination with the dynamics of blood formation and its morphological characteristics on the classifying blood form; Finally, on the basis of blood formation of the physics mechanism, analysis model is established, through experiment and case study analysis the formation mechanism of all kinds of blood on the scene of the crime form, studies how to utilize the scene bloodstain pattern that blood source direction, field of blood formation sequence and the scene in the relationship in bleeding and behavior ability. These problems research through blood stains on the spot, in order to the use of domestic blood morphological analysis technology and development help.Bloodstain pattern analysis involves physics, fluid mechanics, geometry, human physiology, forensic science, mathematical statistics, computer technology, and other multi-disciplinary knowledge. Paper difficulties lies in:one is to use the physics and fluid mechanics to blood flow is modeled, and then analyzed the formation mechanism of the field of blood; Behind it is the basis of analyzing the scene bloodstain pattern is also a key difficulty;Two is to live on the second splash down blood and the blood back to the analysis and research of the splash phenomenon; Three is to live the blood bleeder inference; Four is to use the blood to the analysis on the reconstruction of the scene when the crime happened activities process, at the same time, these problems are also at the heart of the paper.