Forensic Science Ms MacCormack Spring 2017 What is forensic serology Branch of forensics that tests blood serum and other body fluids Testing would inlcude Blood typing Characterization of unknown blood ID: 584119
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Slide1
Serology
Forensic Science
Ms
MacCormack
Spring
2017Slide2
What is forensic serology?
Branch of forensics that tests blood serum and other body fluids.
Testing would
inlcude
:
Blood typing
Characterization of unknown blood
Stain patterns
Paternity testing
Semen identification in rape cases
DNA techniques used for identificationSlide3
What is blood?
Blood is a circulating fluid that provides the body with nutrition, oxygen and waste removal.
The average person has about 5 liters of blood in their body.Slide4
Parts of blood
Blood is made up of the following:
Water Cells
Proteins Inorganic Salts
EnzymesSlide5
Plasma
Plasma is the liquid part of blood
Makes up about 55% of the blood
Consists mostly of water and substances dissolved in it.Slide6
Solid Particles of Blood
The solid particles found in blood are:
Erthrocytes
(Red blood cells) – carry oxygen and CO
2
Leukocytes (White blood cells) – fight infections
Platelets – helps the blood to clotSlide7
Questions that a
Foresenic
Scientist would ask
Is it blood?
Luminol
Test
Is it human blood?
Precipitin Test
Can it be associated with an individual?Slide8
Luminol Test
Luminol
is sprayed on an area where blood could have been.
If traces of blood are present where the
luminol
has been sprayed, the area will glow.
This glowing is due to the reaction of the
luminol
with hemoglobin.Slide9
Luminol Tests
Luminol
Demonstration
Detecting Blood Using
LuminolSlide10
Precipitn Test
Used to determine if a blood sample is human or not.Slide11
Blood splatter analysisSlide12
Types of Splatters
Passive (Dripping)
Transfer (Smearing)
ProjectedSlide13
Projection Splatter Analysis
There are two important determinants:
Direction of the splatter
Angle of impact with surface