Bloodstain Patterns

Physical evidence that is left behind in a crime scene plays and important role in reconstructing the various events that took place during the crime . Crime scene reconstruction depends upon joint efforts of law enforcement personnels, medical examiners and criminologist to find the physical evidence and to understand the events that surrounds the occurrence of a crime. If there is a bloodstains then the location and the distribution of the blood stain along with the spatters maybe useful in explaining the events that caused the bleeding. An investigator can decipher from an individual bloodstain, the direction of blood, when it impacted the surface it was deposited on. Bloodstain patterns, consisting of many individual bloodstains …show more content…
These classifications are used for descriptive purposes only and should not be used to determine the kind of force that produced the pattern. The area of convergence if an impact spatter pattern is the area the individual stains emanated from on a two-dimensional plane. The area of origin of bloodstain pattern in three-dimensional space may represent the position of the suspect or the victim when the event that produced the stain occurred. Gunshot spatter consists of very fine spatter originating from both forward and backward spatter, forward spatter being from an exit wound and backward spatter from an entry wound, or only the backward spatter if the bullet did not exit the body. Blood cast off from an object, typically a weapon or fist between delivering blows to a victim may form an arc pattern on a nearby surface. The features on the surface can suggest the kind of object that created it and the minimum number of blows that were delivered by the