April 10, 2010
Blood Spatter Analysis
A blood spatter analysis is a method of how officers and scientists use to solve
crime scene investigations. Scientists solve the crime by the pattern, blood droplets and the distance of the blood drops. Blood spatter analysis can help determine the movement and directions of the person who is shedding the blood, the position of the person, the movement of the person after the blood shed, and the direction of the stain, the area of the origin.
You can have different kinds of stains. There is passive, which is made by gravity. The second is drip and projected bloodstains, which occurs by a form of energy that is being transferred to a blood source. And the last bloodstain is transferred blood, which is when an object with blood comes in contact with an object or surface that does not have blood.
Their are also impact stains. Impact stains show the velocity. There is low, medium, and high. The higher the impact stain is the faster the impact was.
To determine the path the blood doplets travelled you have to determine the point of area of convergence. A method that is used for this is the stringing method. The point of convergence is the interrsection of two bloodstain paths, where the stains come form opposite sides of the impact pattern and the area of convergence is the box formed by the intersection of several stains from opposite sides of the impact pattern.