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Blood droplets on glass look different from blood on fabric or some other
porous material.
Blood Spatter
model is built of the crime scene to aid in the reconstruction of the crime.
The forensic expert places drawings or pictures of each blood droplet in
the model and then uses string to retrace the path of flight of the droplets
from the source. Image 4 is a sample crime-scene reconstruction common
to the process used to trace the path of blood droplets.
A forensic physicist can easily determine the point of origin of blood
droplets by drawing lines through each individual droplet back along the
path from which it came. The place where the lines converge, or come
together, is the point of origin. Each point of origin at a crime scene is in-
dicative of a source of blood spatter. At this point, it does not matter to the
forensic scientist whether the blood came from the victim or the criminal;
