BeardenD+R79-99

Ramsland 79-99 notes

Trace evidence gets compared with a database or gets held to compare with other evidence, some goes through extensive analysis

The more unique something is when tied to a suspect the more likely that it will have value to the prosecution process

Every piece of Physical evidence must be analyzed CSI agent follows Einstein’s three rules -	out of clutter, find simplicity -	from discord, make harmony -	in the middle of difficulty, find opportunity

Crime Lab- the science lab- it’s sterile and efficient -	evidence clerks- log in the evidence -	drying area- temperature controlled room for wet evidence -	photography- digital, ultraviolet and x-ray photography -	identification- fingerprint analysis, examination of impressions -	chemistry/biology- screening tissue, blood pattern analysis, testing of other bodily fluids -	firearms/ballistics- shooting range and a program that accesses databases for firearms, bullets and cartridges -	arson/explosives- analyzes fires, bombs and debris -	traces- how evidential material function in a crime -	general instruments- maintenance people for the machines and devices needed for making different analyses -	computer analysis -	question documents- forgeries, ransom notes etc. -	polygraph- lie detector -	evidence collection- collect evidence and transport it -	evidence storage -	setup rooms- evidence from the victim can be kept separate from evidence form the suspect -	administrative offices-oversee working of the lab Four Federal Crime labs: FBI, Drug enforcement admin., Bureau of Alcohol, Tobacco and Firearms, U.S. Postal

Crime Lab Instruments- -	beaker, flask buret and pipet, graduated cylinder, test tubes, watch glasses -	microscopes; low power, compound, phase-contrast, electron -    device for electrophoresis- uses electrical current -    nuclear reactor- neuron activation analysis -    refractometers- measure the refractive index in substances -    device for liquid chromatography- separates chemical by absorption

Trace Evidence -	Hair Analysis- can determine Race and age, hard to figure gender though -	Fibers- smallest unit of a textile material, can be natural or manufactured o	Cross transfer of fibers -	Glass- different types have different densities- mix of bromoform and brombenzine used, also have different refractive indexes o	Can tell how the glass was broken -	Dust/dirt- can determine where the suspect or victim has been -	Palynology- pollen data -	Paint- color analysis, shape is analyzed