ABSTRACT
Blood-spatter analysis or blood-stain pattern interpretation is used by investigators to reconstruct the crime scene to determine the sequence of events, number of impacts of the weapon to the surface, weapon characteristics, whether or not statements provided by witnesses, victims, and suspects are consistent with the scene, and to apprehend individuals responsible for committing the crime. Blood-spatter analysis takes into account the properties of blood and the principles of gravity to explain the placement of different types of blood at a crime scene. Blood is a cohesive molecule, which leaves the body and, based on velocity and gravitational pull, is moved through the air until it collides Blood on a smooth surface https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315721811/276059fb-2575-4c03-9ea9-45b53f7837af/content/fig0115_B.jpg" xmlns:xlink="https://www.w3.org/1999/xlink"/> Blood on a rough surface https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315721811/276059fb-2575-4c03-9ea9-45b53f7837af/content/fig0116_B.jpg" xmlns:xlink="https://www.w3.org/1999/xlink"/> with a surface, such as a wall or floor. Once the blood makes contact with a surface, the type of surface dictates the form of spatter that will be seen by the investigator. If the blood impacts a smooth textured surface, such as glass or a flat tile, there will be little spatter. If the blood impacts a rough textured surface, such as wood or corrugated tile, there will be extensive spatter.
