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25 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Criminal investigation |
The reconstruction of a violation of criminal law in order to identify and locate the perpetrator and gather evidence for trial |
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Step one |
Record time the call was received, you time of arrival, and weather condition |
Preliminary investigation |
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Step two |
Find out if anyone is injured , what happened, who is the suspect, where did they go and who is the victim |
PI |
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Step three |
Give aid to anyone injured |
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Step four |
Conduct a protective sweep |
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Step five |
Protect the scene and call for necessary assistance |
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Step six |
Locate and identify witnesses |
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Step seven |
Broadcast any lookouts or necessary information |
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Step eight |
When the requested assistance arrives, secure the scene more adequately |
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Step nine |
Walk through: locate potential evidence, to establish a path that is safe to walk through, to mentally trace the events of the crime |
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Step ten |
Photograph, measure, and sketch the scene |
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Step eleven |
Collect, label, and package evidence |
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Step twelve |
If necessary, secure the scene until some follow up investigation is done |
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Scene protection |
To prevent the destruction of evidence and to allow for an accurate reconstruction of the events occurring at the scene |
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Boundaries |
Place of arrival, point of entry, part through scene, contact with scene, contact with victim, place of exit, place of arrest |
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Statement |
A first hand account of a crime as given to an investigating law enforcement officer |
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Sources of statements |
Witnesses Victims Suspects |
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Parts of statement |
Body- narrative (individual tell story) question and answer (interviewer able to control the interview) Allow person to tell facts in the order they recall them Use words within subject's vocabulary Closing - where statement was taken, investigators that took the statement , if written statement then the individual signature should be collected |
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Reconstruction |
Field notes Photographs A crime scene sketch Evidence custody documents |
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Photographs |
Photographers name Case number Type of case Date of photo |
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Measurements |
Triangulation Rectangular coordinate method Base line |
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Search |
Strip method The grid The zone method The spiral method |
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Physical evidence |
Most important type of evidence in establishing the guilt of the accused |
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Follow up procedures |
Review of existing info Discuss with other officers for m.o., motive, theory of what happened Re-interview witnesses Identify, locate, and interview additional witnesses Identify possible suspects Establish suspects intent, capability, opportunity, motive Search sources to find and arrest suspect Once arrested learn all from suspect Try and get confession Prepare case for court Report- crime was committed and what type, defendants involvement, evidence and chain of custody, present material orderly and logically, identify competent witnesses Discuss case with prosecutor District attorney gets copy of documents |
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Establish modus operandi M.O. |
To show pattern of criminal behavior Associate numerous crimes with a single suspect Possibly predict the perpetrators next target Assist investigators in recognizing the characteristics of criminal activity |
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