1. Warm UP
What is Locard’s exchange principle?
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QUIZ: Monday

2. Crime Labs & Functions of Scientists

3. 4 major Federal Crime Labs
FBI
DEA
Bureau of alcohol, tobacco, firearms and explosives
US Postal inspection service

4. Services of the Crime Lab
Physical science unit- applies techniques of chemical, physical, geology to compare evidence
Biology unit – DNA
firearms unit- firearms, bullets, shells
Document examination- handwriting
Photogrophy unit- examine & recover physical evidence
Toxicology unit- body fluid & organs to determine presence/ absence of drugs and poisons

5. Services (cont’d)
7. Latent fingerprint unit- process and examine fingerprints 8. Polygraph unit 9. Voiceprint analysis unit 10. CSI unit- collect & preserve evidence

6. Details Biology Unit- dna, bloodstains, hairs, fibers, plant material
Firearms- guns, discharge residue, weapon firing
Documents- source of documents, paper, ink, writing samples
Photogrophy- recording evidence, invisible information made visible.

7. Functions of the Forensic Scientist
Analyze physical data
Determing admissibility of evidence
Frye vs. U.S.- in order to be admitted as evidence at trial, the procedure, technique or principles must be “generally accepted” by a meaningful segment of the relevent scientific community
3. Judging scientific evidence
4. Providing expert testimony
“expert”- education & experience
offers an opinion based on training & evidece
5. Furnising training in the proper recognition, collection and preservation of physical evidence.

8. Review!
Describe a piece of evidence responsible of the physical Science Unit
Describe a piece of evidence responsible of the the Biology unit
Describe a piece of evidence responsible of the firearms unit
Describe a piece of evidence responsible of the photogrphy unit
Why should a forensic chemist be willing to testify in court

9. Case Analysis
Describe the primary issue of law whose resolution by the court was critical to the state’s ase against Dr. J
How did the court ultimately rule on this issue? Describe the main arguments supporting the courts decision
Describe the primary scientific issue raised during the trial. What were the defense’s main challenges to the scientific evidence presented by the prosecution?
What do you feel wre the main issues of this trial? What would you have done differently or the same?