FORENSIC SCIENCE. Serology  Blood Typing  ABO Blood Typing.

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Presentation transcript:

FORENSIC SCIENCE

Serology  Blood Typing  ABO Blood Typing

Serology 1&sk=#view=detail&id=9B65A26E913EDC B3B03EA0D1E9F4374F&selectedIndex=30

Serology  Presumptive vs. Confirmatory Testing  Blood: TMB : Tetramethylbenzidine + H2O2 -> blue/green HemaTrace LMG Luminol BlueStar

 Serology  Gatekeeper of DNA analysis  Extraction  Quantification  Amplification  Capillary Electrophoresis  Data Analysis

Amplification PCR = Polymerase Chain Reaction 1.Denature 2.Anneal 3.Extend

Data Analysis  Single Source:

Data Analysis  Mixture:

Example

Hair  Cuticle  Scales  Cortex  Medulla

Hair Stages of hair growth: 1.Anagen 2.Catagen 3.Telogen

Hair

Fingerprint Analysis

Class characteristics

Fingerprint Analysis

Individual Characteristics

Fingerprint Analysis  Collecting prints:  Porous surfaces (anything that can absorb): Ninhydrin : causes purple reaction DFO : glows when illuminated by light  Nonporous surfaces (things that don’t absorb): Powder (black and fluorescent) Pictures Cyanoacrylate (superglue fuming)

Example 1.Look at unknown 1.Shape 2.Minutia 2.Compare

Blood Spatter Analysis Methods: -Angle of Impact -Direction of Travel -Stringing

Blood Spatter Analysis

Glass Analysis -Concentric Cracks -Radial Fractures Which came first? A or B?