Essay, Research Paper: Crime Detection

Legal Issues

Free Legal Issues research papers were donated by our members/visitors and are presented free of charge for informational use only. The essay or term paper you are seeing on this page was not produced by our company and should not be considered a sample of our research/writing service. We are neither affiliated with the author of this essay nor responsible for its content. If you need high quality, fresh and competent research / writing done on the subject of Legal Issues, use the professional writing service offered by our company.

In recent times, science has provided substantial aid to crime detection.
Because anything in the physical universe has the potential of becoming an item
of evidence in an investigation, a wide variety of procedures may be used in
analyzing and interpreting evidence in a criminal case. These procedures include
handwriting analysis, forensic photography, crime scene documentation,
metallurgical investigations, chain of custody, entomology, and blood spatters.
The first thing you do after securing a crime scene is document it. Always take
pictures. They are the best records available. They show the crime scene as it
was found; where objects are in relation to other objects, victims, rooms, etc.
Take notes. Describe the scene, it’s over all conditions. Describe rooms,
lights, shades, locks, food; anything that can indicate a time frame, condition
of scene or that might have even the slightest evidentiary significance. Check
dates on mail and newspapers. Diagram the crime scene. Take measurements. Photos
are good to show where an object is in relation to another object, but
measurements tell exactly how far. True handwriting analysis involves
painstaking examination of the design, shape and structure of handwriting to
determine authorship of a given handwriting sample. The basic principle
underlying handwriting analysis is that no two people write the exact same thing
the exact same way. Every person develops unique peculiarities and
characteristics in their handwriting. Handwriting analysis looks at letter
formations, connecting strokes between the letters, upstrokes, retraces, down
strokes, spacing, baseline, curves, size, distortions, hesitations and a number
of other characteristics of handwriting. By examining these details and
variations in a questioned sample and comparing them to a sample of known
authorship, a determination can be made as the whether or not the authorship is
genuine. Another is, Metallurgical Investigations--examinations make it possible
to identify the source of an item—whether made of metal, plastic, ceramic, or
other material—found at a crime scene, and further, to determine if two
similar items were fractured from each other, the nature of the force causing
the fracture, the direction from which the force came, and the time when the
fragments became separated. Such identification helps trace the evidence to its
owner. The metallurgist can also restore obliterated or altered numbers on
objects of any material. Mineralogical Investigations is the science of
mineralogy is also used in crime detection. The mineralogist studies soil,
plaster, cement, brick, concrete, and glass for any evidence. Mineral analyses
have shown that differences may be detected in soil composition. Soil and dust
found on a suspect's clothing and determined to be comparable to that at the
crime scene help to prove the person's presence in that locality. Toxicology may
be defined as the science of poisons special methods of analytical chemistry
have been developed for use in toxicological examinations. The specimens
ordinarily examined in cases of suspected poisoning are tissue samples from
vital organs, blood or urine, food, drink, and the suspected poison itself.
Firearms are identified through microscopic imperfections that are produced
inadvertently in gun barrels during manufacture. Subsequent use and wear
contribute further to a weapon's individuality. Chain of Custody is of paramount
importance to any investigation. It is the unbroken sequence of events that is
caused by an item of evidence from the time it is found at the crime scene to
the time it appears in court. Every link in this chain is documented, from
discovery at the crime scene, through evidence gathering, storage, and lab
analysis return to storage, and transfer to court. Every link is documented by
date, time, and handling individual, what was done with the evidence by that
individual. If chain of custody is broken, if the evidence cannot be accounted
in one step of its journey from crime scene to courtroom, it is rendered
inadmissible; useless to the case. Blood spatters help a great deal in
reconstructing a crime scene. They can be used to corroborate or disprove and
alibi. They can be used to convict the guilty. There is much more to it than
looking at a stain or spatter and saying, "This is where the crime took
place." The patterns of the spatters and the shapes of the individual blood
droplets themselves can tell how the crime was committed. Drops falling from
different heights (i.e. at different speeds) will leave different looking
spatters. A drop falling from a low height of a few inches will leave a small
cohesive circle. At greater heights, the circle will be larger and may even have
a 'crown' effect. Hitting a surface at an angle does even more to disrupt a
blood droplet. Perpendicular impact leaves a droplet fairly uniform, as shown
below. A droplet hitting a surface at an angle will bulge out in one direction,
indicating the direction of travel of the droplet. Cast off stains is a result
of blunt force trauma (beating with an object such as a hammer). Pulling back
from a blow produces a blood spatter that indicates direction, by creating an
arc of blood droplets. You can determine the number of blows inflicted by
counting the arcs. You can also determine the orientation of the individuals
involved the size of the object used and the right or left handedness of the
Good or bad? How would you rate this essay?
Help other users to find the good and worthy free term papers and trash the bad ones.
Like this term paper? Vote & Promote so that others can find it

Get a Custom Paper on Legal Issues:

Free papers will not meet the guidelines of your specific project. If you need a custom essay on Legal Issues: , we can write you a high quality authentic essay. While free essays can be traced by Turnitin (plagiarism detection program), our custom written papers will pass any plagiarism test, guaranteed. Our writing service will save you time and grade.

Related essays:

Legal Issues / Crime Diminishing
The current rate of crime in our society has reached alarming proportions. new senseless killings of innocent lives, the harassment of law abiding citizens, and loss of property is totally not accept...
For example, the United States Census combines their population data with crime data compiled from the FBI's Uniform Crime Reporting system (UCR) to produce crime rates. These rates are calculated wi...
Legal Issues / Criminal Justice
This paper will describe my understanding of the text and of the lectures provided in the class. Unlike most classes, where I understood only my view of the text, this class was geared so each studen...
Legal Issues / Criminal Justice
The two vehicle stops were made for different reasons. The first vehicle, the white Toyota Camry, was stopped because it fit the description of a vehicle that was just used in a bank robbery. This gi...
Legal Issues / Criminals
Do prisons teach people to become worse criminals? Many people think that a prisoner is taught how to be a better criminal while in prison. Prisoners are integrated with people that have committed wo...