FORENSIC SCIENCE

Serology  Blood Typing  ABO Blood Typing

Serology http://www.bing.com/images/search?q=anti%20abo&qs=n&form=QBIRMH&pq=anti%20abo&sc=8-8&sp= 1&sk=#view=detail&id=9B65A26E913EDC14897103B3B03EA0D1E9F4374F&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

Hair

Hair

Hair

Fingerprint Analysis

Fingerprint Analysis Class characteristics

Fingerprint Analysis

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

Blood Spatter Analysis

Blood Spatter Analysis

Blood Spatter Analysis

Blood Spatter Analysis

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