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Fingerprints - how fingerprints solve crime
Fingerprints - how fingerprints solve crime
Fingerprints are something most people don't spend too much time
thinking about on a daily basis. In fact, unless someone is
trying to remove pesky fingerprints from furniture or mirrors,
it's unlikely an average person thinks about fingerprints at all.
However, for some, fingerprints are a vital part of their work
life. Law enforcement officers and forensic specialists spend
hours thinking about how fingerprints solve crimes, and trying
to find, collect, record and compare these unique identifiers
that can connect a specific person to a specific crime. These
individuals understand that a basic human feature that most
people take for granted, can be one of the most effective tools
in crime solving.
Every person is born with their own unique set of fingerprints.
No two fingerprints have ever been found to be exactly alike;
not on identical twins (although these are extremely similar),
not even on a person's own hand. The unique whorls and lines
that make up an individual's fingerprints are formed in the
foetal stage and remain the same throughout the entire life
span. This makes for a unique mark that can positively identify
one individual against another, particularly useful when a
person of interest already has a recorded set of fingerprints on
file with police, military or other government institutions.
Fingerprints are made up of a collection of swirling lines. The
way these lines form and pattern themselves is what makes each
fingerprint unique. Despite the incredible number of different
fingerprints, there are only seven different types of lines that
make up fingerprints. These lines may start, stop or split at
any place within the print. The formations, angles, lengths,
heights and widths make billions and billions of different
prints.
With their unique qualities, it becomes easy to see how
fingerprints can help solve crimes. Leaving a fingerprint is
like leaving a calling
card at the crime scene. There are a few
different ways fingerprints get left behind by careless crooks.
The most common way is from fat or oil that is transferred from
the finger to an object like a doorframe or table. Amino acids
from the finger may also leave a discernable mark. Fingerprints
can also be detected as an impression in a soft substance such
as putty. Finally, they can be made by a substance on the finger
such as blood or paint.
Uncovering fingerprints to help solve a crime can be done in a
few ways. Adhering powders to fresh fingerprints will cause the
powder to stick to the grease and make the fingerprint visible.
Another method is by using a few drops of cyano-acrylate or
superglue. When these drops are heated, they vaporized and the
smoke attaches to the fingerprint leaving a clear white
print. Specialised crime scene laboratory equipment can also
find fingerprints, but not all authorities have access to all
equipment.
Fingerprints can be saved for further investigation in a number
of ways, including:
take a photograph of the print
store it on a rubber lifter or tape
keep the original ground the print is on
copy the print using digital technology
Ideally, from a crime-solving perspective, it is hoped the
interconnected nature of our society will eventually lead to
having all fingerprint databases linked for easy
cross-reference. However, there are several issues to be dealt
with, such as funding, jurisdictional bickering, security and
privacy to consider before such a fingerprint system can exist.
For more information on finger printing please feel free to
visit our site at http://www.justfingerprints.com/
About the author:
Fingerprints are something most people don't spend too much time
thinking about on a daily basis. In fact, unless someone is
trying to remove pesky fingerprints from furniture or mirrors,go
to our site at http://www.justfingerprints.com
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