CSI: Gervais

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CSI Gervais
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Starring . . .
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Alejandro Cruz
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Esmeralda Gomez
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Ivan Gonzalez
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Elesei Kalugin
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Olivia Marshall
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Mayra Niniz
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Amber Pate
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Chris Ramsey
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Zach Sandvig
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Brian Siriwannahong
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Teresa Tello
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John Wagner
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Forensic Techniques
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DNA Evidence

• Body fluids, such as blood, and saliva, are
  commonly used in forensic investigations as a
  source of cells for DNA extraction and analysis.
• http//www.courttv.com/forensics/lab/

A distinctive DNA print from a crime scene when
matched to suspect's DNA print can place a
suspect at the crime scene.
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Bite Marks
A dental expert, or forensic odontologist, has
numerous roles, one of which is to match the
bite-mark impressions on a victim to the tooth
structure of suspects.  Teeth are tools and a
tooth mark is like a tool mark.  Generally the
teeth that leave the strongest impressions are in
the front, both top and bottom.
http//www.courttv.com/forensics/lab/

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Fingerprinting

Fingerprints are the unique patterns created by
skin ridges found on the palm sides of fingers
and thumbs. It is one of the most useful evidence
pieces in forensic science. http//www.courttv.co
m/forensics/lab/
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Firearm Comparison
Sometimes incorrectly referred to as ballistics,
firearms identification can be defined as, The
identification of fired bullets, cartridge cases
or other ammunition components as having been
fired from a specific firearm.
http//www.courttv.com/forensics/lab/

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Time of Death (TOD)

Medical investigators look for various signs to
help them estimate a time frame -- usually a 2 to
4-hour window of time -- in which the victim
probably died. http//www.pathguy.com/TimeDead.htm
http//www.courttv.com/forensics/lab/
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Fiber Comparison

Placing a suspect at the scene of a crime is an
important element in criminal investigation. This
can be achieved through the location of fibers
similar to those from the victim's clothing or
the crime scene on the clothing of the suspect,
or through the discovery of fibers like those in
the suspect's clothing at the crime scene. This
can also be done with hair. http//www.courttv.com
/forensics/lab/
Carpet fiber
Two matching hairs identified with the comparison
microscope
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Ritualistic Behavior

Investigators look to see whether a crime's
method of operation, or MO, was the same or
different, and whether either or both crimes
involved any ritualistic behaviors that could be
used to characterize the suspect. http//www.cour
ttv.com/forensics/lab/
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• Shoeprints and Casting

Characteristics that result when something is
randomly added to or taken away from a shoe
outsole that either causes or contributes to
making that show outsole unique Casting can
retrieve a three-dimensional footwear
impression. http//www.courttv.com/forensics/lab/

Sneaker print with 10 distinctive characteristics
creates a fingerprint of the shoe.
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Blood Spatter

The impact of spilled blood on surfaces. The
patter of the impact can provide vital
information about the source of the blood. Blood
spatter can help determine the size and type of
wounds, the direction and speed with which the
perpetrator or victim was moving, and the type of
weapons used to create the blood spill.
http//www.courttv.com/forensics/lab/ http//www.b
loodspatter.com/BPATutorial.htm
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Accelerants

Investigators can prove that a fire was set
intentionally by finding an accelerant at the
scene of a fire. An accelerant is a chemical fuel
that causes a fire to burn hotter, spread more
quickly than usual, or be unusually difficult to
extinguish. The presence of an accelerant in fire
debris can be used as evidence of arson.
http//www.courttv.com/forensics/lab/
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There are many, many, many more topics of
forensics!Check out a book, take CCCs
forensics class, look on the internet, and pass
your science classes!