University of Maryland General Consideration in A Crime Scene Lab Report

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Science

University of Maryland - University College

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I need help with my crime scene investigator lab. It is very confusing and I do not have the time to do the labs. I need help with stating out whats important when entering the crime scene. I just need someone to do the lab report real simple and to take lab notes. I have all the material you need which will be on my blackboard.

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Running Head: LAB REPORT

1

Lab Report
Student’s Name
Institution Affiliation
Date

LAB REPORT

2
Lab Report
General consideration in a crime scene

After arriving at a crime scene, it is crucial to obtain the package soon before it is
contaminated or lost. The next thing is to check for the obvious; the presence of fibres such as
clumps of fibres, pieces of fabric including threads, tape, rope, individual filaments and
yarns. It is also crucial to identify the sources of the fibrous evidence present on a victim may
it be from suspect’s clothing, bedding, upholstery and carpet as well as rugs. The next step is
to perform miscellaneous considerations which involve obtaining the entire item when
possible or lifts of the item when the entire item is not entirely obtainable and most
importantly take pictures of the locations of the fibre, fabric impression and pieces of fabric.
While packaging the evidence it is vital to protect it from contamination, damage and
loss of traceable evidence. It is also necessary to protect stab holes, impressions and bullet
holes and avoid flattening. It is also necessary to remove fibres which may be dislodged
while noting where they were removed from. It is also important to cover the area of the
intern with a piece of paper sealing its edges. More importantly, it is necessary to wrap fabric
impressions to avoid them from being scratched or rubbed as well as ensuring the fibres are
not lost or contaminated. Different boxes are recommended in packaging evidence from
various people and locations. The containers are then marked and sealed. Lastly, it is
important to ensure that fibres do not come into direct contact with glass and plastic.
Lab Report
Introduction
Structure and colour are deemed the most important forensic characteristics of hair in
the lack of a sufficient sample of hair and root with blood or skin. Once hair is collected from
a crime scene together with several control hairs it can provide sufficient evidence to place an
individual in a crime scene. Hairs further shed lights on how the hair was sourced since it is

LAB REPORT

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simple to note the difference between hairs sourced forcibly and simply cut or fallen out. A
hair shaft is made up of three parts; the cuticle (outer layer) composed of scales that align to
the direction of the tip of the hair and scale pattern varies in each species. The canal (central
layer) is known to be continuously fragmented and interrupted. The cortex lies between the

medulla and the cuticle and carries the hair pigment.
The forensic first duty is to determine whether the hair belongs to a human or it
belongs to an animal. Animal hair and human hair have distinguishable features as presented
below:
Colour and
pigmentation:

Consistency
Distribution
Density

Shape of root
Scale pattern of cut...


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