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A Study in Scarlet: Blood Pattern Analysis

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by

Ryan Marquardt

on 12 May 2013

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Transcript of A Study in Scarlet: Blood Pattern Analysis

Categories of Impact Spatter
Low energy
Medium energy
High energy History
Hans Gross "System Der Kriminalistik" (1883)
Sherlock Holmes "A Study in Scarlet" (1887)
Dr. Eduard Piotrowski, Institute for forensic Medicine, Poland (1895)
Hardly used for 50 years! Fundamental Theory
Based on physics
Surface tension
Gravity
Importance of consistent laws Other Types of Spatter
Arterial
Direct transfer
Castoff Identifying Origin Other Applications
Tracking/Diagramming
Identifying weapon Real Life Cases
Velez Case
Woburn, Massachussets
Two stabbing victims
Blood stain on thigh of jeans
Idelfonso Velez convicted of double homocide, sentenced to two life terms
Hale Case
Kawartha Lakes, Ontario, Canada
Jack Hale on trial for the murder of estranged wife, Yvonne Leroux
Admitted to accidental shooting
BPA used to diagram crime scene
Hale conviced of first-degree murder, life sentence Training
Criminal justice/forensic science degree
Workshops/continuing education
Experience Technology
Research projects
Computer programs
Diagramming
Stringing
Indicator sprays Limitations
Contamination
Amount of blood
Mind of the investigator A Study in Scarlet: Blood Pattern Analysis
Full transcript