Scene Investigation and Evidence Collection
Respond to the following questions:
What are the steps and
characteristics of a successful criminal investigation?
Why is evidence collection so
important to a crime scene investigation?
What can negatively and positively
impact evidence collection? Provide examples from a particular crime scene
featured in Criminal Investigation or another source
Individuals answer below
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conducts the preliminary investigation? The first responding officers often
handle the preliminary investigation as they are the first on scene and need to
determine if a crime was committed and by whom. The patrol officers who
respond to the calls for service gather the basic information of who, what,
when, where, how, and if possible or known why.
is it determined if a follow-up investigation is to be conducted? Time frame,
leads, solvability, duration of investigation, type of crime committed, and
evidence all determine if there is a need for follow up investigation to be
done and if the officer will do it or if it will be sent to the detective unit.
conducts the follow-up investigation? Depending on the crime and evidence as
well as the shift the initial officers are working it could be patrol or the
detective unit that follows up on the investigation.
are solvability factors? Things like witnesses to the crime, physical evidence
recovered, suspect identification or description, and can the property be
identified are all part of the solvability of a crime. Without things like a
witness or information on the property that can identify it it is very hard to
solve a case.
there any advantages to having a prosecutor present at the crime scene during
processing? If so, what are the advantages? The Da will have first-hand
knowledge of the scene and what the officers were dealing with so when it comes
to court they can better direct and question the officer. It makes it
easier for the DA to understand what was done and why. On the other hand it is
one person that could contaminate evidence.
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