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Passive stains
No activity associated with it, transfer, flow patterns,
saturation stains, and stains from dripping blood
Luminol
used for both presumptive test for blood as well as a method of chemical and enhancement of impressions in blood on various surfaces without ruining DNA
Cast off
created by subsequent blows to the same general area where a wound has occurred and blood has accumulated
the surface blood lands on
does effect appearance
velocity associated with gun shot wounds are
high
velocity 90 degree blood stain
low
tail of a blood stain shows direction of
travel
90 degree stains are
circular in shape
As the degree number gets smaller
the stain gets longer and thinner
The more paths that cross, the more come together
hinting how strong the origin may be
Note 
Flashcard (40)