COMBINATION of FORENSIC 3D
with EXTERIOR BALLISTIC SOFTWARE
and TOTAL STATION MESUREMENT
3D software
on other hand is a powerfull visual tool to show slope of particular terrain,
influence of wind to change of ballistic trajectory direction, differences of
ballistic trajectory with respect to line of bore or line of sight. Those
differencies are very important to answer the most important question: was a suspect aiming at a victim or it was an unintentional hit?
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example shows an application of combination of Exterior Ballistic s/w EB v. 40
with Forensic 3D technology. In this casework example was also extremely
important to precisely measure slope of terrain on crime scene. A
precise 3D model of the terrain was measured by use of Total Station. Horizontal
and vertical precision of precisely measured model (showed
in animation by light green colour ) was +/- 10 mm, relative. Horizontal and vertical
precision of sorrounded terrain (showed in animation by dark green colour)
made by
digitizing charts (1:5000) was +/- 40 cm, relative.
Once
precise 3D model of crime scene was defined, a 3D model of a suspect and a
victim are positioned on the 3D model according to their versions of the
shooting incident. Finally, precise 3D model of a ballistic trajectory from EB
v. 4.0 was inserted in the 3D model. This gives us the possibility to explore
possibilities of different shooting scenarios.
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Forensic 3D animation shows us example of a virtual camera moving arround the
crime scene and showing important details like position and posture of a suspect
and a victim during wounding. Curved red line is the ballistic trajectory while
black straight line is imagined extension of bore axis .
(avi,
185 kB, start on mouse over)
(to see this Forensic 3D animation please download DivX 5 codec)
See bigger version of the Forensic 3D animation (422 KB)
Next Forensic 3D animation shows the same shooting incident but this time virtual camera is moving along ballistic trajectory showing differencies between trajectory and imagined extension of bore axis . To see it please click next
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