Bloodstain Analysis

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Bloodstain Pattern Analysis
Lab Write Up

May 8th, 2013
Maddie Lilienthal- Background
Denisha Addy - Procedures
Sahaii Edden- Data Table, Analysis & Conclusion

Background:

Bloodstain pattern analysis, BPA, is used in many cases, mostly pertaining to murder, by forensic scientists and police investigators. This evidence is not new, but has not been recognized until the past few decades. BPA uses math, biology, chemistry, and physics as well as new technologies to help create a picture for how an event happened or did not happen in a case involving bloodshed. Historical cases: (rephrase)

* In 1862 Dr. John Swinburne describes the death of Minister Henry Budge’s wife and correlates her injuries with the bloodstains (or lack thereof). * 1895 – Eduard Piotrowski – “Entstehung, Form, Richtung und Ausbreitung der Blutspuren nach Hiebwunden des Kopfes”. This was the first truly scientific study of bloodstain pattern analysis. *

Famous scientists: (rephrase)
* 1887- Hans Gross - “System Der Kriminalistik”. While this work covers many topics, he describes the importance of protecting bloodstains and in a chapter entitled “Traces of Blood”, described basic bloodstain patterns. * 1939 – Dr. Victor Balthazard (Piedelievre, Desolille & Derobert )– “Etude des Gouttes de Sang Projete”. Presented paper to the XXII Congress of Forensic Medicine and its purpose “was to pinpoint characteristic elements of a bloodstain which might give decisive hints as to its origin”. This group recognized the trigonometric relationship between the length and width of a bloodstain, that the dynamics of a blood-shedding event could not always be re-created under laboratory conditions and they were aware that the nature of the target surface must be taken into consideration * Karl Landsteiner distinguished the blood types in 1900. Later in 1937, he and Alexander S. Wiener discovered the Rhesus factor which was important because it enabled physicians to...
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