Blood Stain Reconstruction
Why look at blood stains?
-used to help identify who may have bled at the scene
-corroboration of witness statement
-prove or disprove suspect statement
-establishes certain facts about the events of the crime scene
What are some types of blood spatter patterns?
What are the dynapics of a drop?
Angle (shows direction)
Distance (size of drop)
Surface (scalloping surface dependant)
Others (environmental changes, the target surface, heat, movement, vehicles, doors, bodies,
decondary dispersion caused by screens, fans, hair, etc, wind, rain)
Originate inside or outside of the fabric
Transfer patters (caused by altercation, such as transferred by a sock, show sequence of
Blood hands/fingers (fingerprints w/ or w/o blood)
Wiping existing stain (wipe pattern—blood exists on surface already and som