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CSI test 1
Terms in this set (23)
People v. jennings
1911- became a landmark legal case because it was the first American appellate case
regarding the admissibility of fingerprint expert testimony. The appellate court concluded that
fingerprint identification is a science and that expert testimony was appropriate to aid members of the
court in understanding fingerprint evidence.
International Association for Identification
evolved into the oldest and largest forensic science organization in the world
investigate crime and ID those responsible
Protection of personal liberty
: police behavior under our
sketches and photographs
Context and the interrelationship of the evidence to the scene and
other items is a major reason why the crime scene technician
documents the scene through what?
changes to the scene or evidence that follows a predictable
rhythm or regularity, like entomological activity, Livor or rigor mortis.
changes that occur randomly or unexpected fashion. EMT
or police disrupting the scene or evidence. This can be disastrous because it can alter
the evidence and scene is lost forever
are temporary effects during a crime scene. Odors ,
temperature, ice in a glass, cigarette burning. Fleeting pieces or information that
eventually will be lost due to time & environment. First responders are trained to look
for such items
manifests itself to the ability of the investigator being able to
physically place items in a scene. Presence of a void on a wall, cluster of casings on the
grass, recognizing a short vs long distance gunshot wound. Evidence outside could be
easily moved by wind, so measuring all items is crucial inside or outside a scene.
is the item or items involved in the crime able to perform normally.
Was gun functional, was door bolt functional, was alarm on. Each tells the investigator
what was possible or impossible
describes traits that allow the item to be
compared with a group. Size, color, brand, pattern seen.
Used as a screening mechanism. Usually for quick elimination.
allows scientist to compare the item
with a specific object or person and include or exclude it as
having originated from that object or person. These are
unique marks resulting from natural variation, damage or
wear. ( ie, fingerprints). But value is determined by the
context of the evidence. ( DNA from lover not rapist).
Things to look for: areas to control because they should contain physical evidence.
Primary focal points
areas with potential evidence (body, casings,tipped over items)
Natrual entry and exit points
perpetrators must enter and exit a scene
may include staging areas, location where they loaded up goods, places where items where deposited as they fled. Dumped bodies
Assessing, observing, documenting, searching, collecting, processing/ analyzing
Activities of scene processing: (6) from less intrusive to most intrusive.
before action is taken the tech must assess the circumstances in order to decide on a proper course of action. Complexity, how extensive, resources required and how used, risks and mitigation of them, what procedures will be used.
looking and mentally registering the condition of the scene and artifacts found at the scene. Less intrusive but still the tech will need to move around the scene which causes some disturbance
written observations, photography, video and sketching. Documentation of observation precedes detailed photography. Photography precedes sketching and measuring. Close up photography and special techniques such as road mapping are always the last action taken. Documentation must capture the content and context of the scene in situ before any significant scene alteration
s intrusive so it is left for after the documentation because items may need to be moved, lifted or dismantled during a search. If new evidence is found, then be prepared to go back to step one for that object.
is mostly done after observation and documentation is finished. Because like bullets once collected they can not be placed back. If item is moved prior to documentation then a written documentation is provided regarding the original location and / or condition.
using chemicals and powders alter the item and may destroy DNA. Also once taken back to the lab for analysis it is changed.
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