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Bloodstreaming

Bloodstreaming

The Directional Analysis of bloodstain patterns is a mathematical procedure, developed by the author, for finding the directions in space (virtual strings) that point from the bloodstains to a spot directly above the location of the blood source. When viewed from above, the virtual strings are seen to converge onto the source position. When viewed from the side, the virtual strings provide an upper limit for the probable height of the blood source. The virtual string direction is computed from the blood droplet's impact angle and the bloodstain's glancing angle. 
The theory relies only on the well-known physical laws of motion plus the resolution of a velocity into its 3 components and simple trigonometry. The theory does not depend on unknown quantities such as droplet sizes and droplet speeds. This procedure has a solid basis in physics and mathematics. Digital cameras are used for gathering the evidence and the analysis is carried out with a computer. 
Directional Analysis, therefore satisfies one of the main criteria for bloodstain evidence specified by the courts; i.e. “it must be shown that the evidence has as its basis sound scientific methodology”. 
The reconstruction of the flight paths of blood droplets with strings is a

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