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Forensic Lab Tour
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Published on Mar 04, 2016
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PRESENTATION OUTLINE
1.
Forensic Lab Tour
2.
Alternate Light Source
Used to uncover hidden traces of evidence not seen by the naked eye
UV Lights
http://images.wisegeek.com/uv-black-light-wand.jpg
3.
Ballistic Photograph
Can be used to examine characteristics of bullets and bullet residues
Can also be used to determine to velocity, distance, and angle the shot was fired
http://facweb.cs.depaul.edu/sgrais/images/Movement/12_l.jpg
4.
Compound Stereo Microscope
Can be used to characterize soil, plants, and clothing fibers
Can magnify objects up to 1000x
5.
SEM
Scanning Electron Microscope
Has the ability to magnify objects up to 200,000x
Can be used to analyze gunshot residue, firearms, handwriting, and counterfeit money
https://upload.wikimedia.org/wikipedia/commons/3/3b/SEM_chamber1.JPG
6.
TEM
Transmission Electron Microscope
Sends a beam of electrons through evidence and can magnify objects up to 500,000x
Can be used to analyze trace evidence
http://biotech.unl.edu/Microscopy/H7500_TEM.jpg
7.
Fume Hood
Used for working with liquids, gases, vapors and chemical fumes
Designed to capture and exhaust fumes resulting from working with these chemicals
https://upload.wikimedia.org/wikipedia/commons/thumb/0/02/Fume_hood.jpg/220...
8.
Chromatogram
Analyses by color, based on original use
Uses two types of phases
Stationary--places particles and keeps them still
Mobile--pumps in the analyte to push through the stationary phase
Used to separate drugs from cutting agents, accelerants from fire residues
https://upload.wikimedia.org/wikipedia/en/9/9d/Base_peak_chromatogram.png
9.
Spectrometer
Can identify components that come out of the gas chromatography column
Can be used to compare two samples of evidence based of the graph produced
http://www.holmarc.com/images/spectrometer_goniometer5.1.jpg
10.
Centrifuge
Used for physical separation, based on density
The mixtures inside are spun at high speeds which cause the substances inside to separate
http://www.scienceclarified.com/images/uesc_03_img0122.jpg
11.
Solid Phase Extraction
Used to concentrate and and purify samples for analysis
Can analyze blood, tissues and even explosives since it doesn't require heat
https://upload.wikimedia.org/wikipedia/commons/d/da/SPE_Manifold.jpg
12.
Computers
Extracts digital evidence
Compiles evidence in Database to link and solve crimes
http://www.bluekaizen.org/wp-content/uploads/2015/12/forensics-lab.jpg
13.
CODIS
Combined DNA Index System
FBI's program of support for criminal justice DNA databases
Collects and stores DNA evidence from past criminals and felons
http://learn.genetics.utah.edu/content/science/forensics/images/dnaprofile....
14.
SICAR
Shoeprint Image Capture and Retrieval Database
Collects shoeprints, shoes of suspects, and shoes on the market
http://viceland-assets-cdn.vice.com/viceblog/32360335footprints.jpg
15.
NCIC
A computerized index of criminal justice information
Includes information about criminal records, fugitive, stolen properties, and missing persons
https://www2.fbi.gov/hq/cjisd/images/ncichead.jpg
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