Bloodspatter Review

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What was Eduard Piotrowski's contribution to the forensic sciences?

First detailed study of bloodspatter evidence in Poland
List several factors that can affect the final shape of a bloodstain formed when a falling blood droplet strikes a surface at a 90 degress angle of impact.

Texture of surface, size/volume of blood, height fallen, force/velocity
Describe the general relationship between the impact angle and the final bloodstain shape.

More oblique impact angle, more elongated bloodstain
Know how to calculate impact angle from a crime scene bloodstain.

Arcsine of theta = width / length
Know which feature of a bloodstain is used to determine direction of impact.

The tail
Explain how one can determine the point(s) of convergence from a set of crime scene bloodstains.

Find the angles of impact; reconstruct direction; area with most dense intersections is the point of convergence
Describe the visual features of low, medium and high velocity bloodstain patterns and the activities that produce them.
- Low velocity
- - more than or equal to 4mm; gravity
- Medium velocity
- - between 1 and 3mm; physical contact
- High velocity
- - less than 1mm; backspatter and forward spatter possible; firearms
Name and describe the various types of bloodstains that can be found at a crime scene and the actions that can produce them.
- Falling
- - trailing
- Contact
- -transfer
- Wipe
- - clean object contacting bloody surface
- Swipe
- - bloody object contacting clean surface
- Cast off
- - flinging/swinging; bidirectionality; linear
- Arterial spurt
- - wavelike; large volume of blood
- Running/flow
- - victim stationary
- Secondary
- - blood dripping into blood
- Void
- - outline of object

Author

lydianoellerae

152731

Card Set

Bloodspatter Review

Description

Made for "Introduction to Forensic Science & Criminalistics" by Gaensslen, Harris and Lee

Updated

2012-05-07T20:10:04Z

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