|
|
Article: Blood, Presumptive Test
- Article from:
- World of Forensic Science
CopyrightCOPYRIGHT 2005 Thomson Gale. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
Blood, Presumptive Test
A forensic investigator can be confronted with a variety of
fluids
at a crime or accident scene. It is critical to determine the nature of each fluid.
While a detailed examination of a suspect bloodstain requires the equipment and technical expertise of an analysis laboratory, a fluid suspected of being blood can be examined at the scene to determine if it indeed could be blood. This examination is called a blood presumptive test.
Properly done, a blood presumptive test rules out the possibility that a fluid is blood. A blood presumptive test relies on the use of chemicals that will change color when in the presence of blood. As one common example, a solution ...