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Forensic Science can be defined as the
use of the scientific method and techniques in the investigation and legal
disposition of a criminal or civil matter. The field of Forensic Science
encompasses many different disciplines. Chemistry, Microscopic Analysis,
Anthropology, Pathology, Fingerprint Identification and Firearm/Toolmark
Examination are just a few examples.
Here, at Pharmacom, we specialize in
the field of Forensic DNA Analysis for human identification. This area of
expertise is concerned with the examination of biological evidence and
determining its source. For example, can a bloodstain or semen stain found at a
crime scene be identified as originating from a particular individual (suspect,
victim) or not? Can the skeletal remains found in the woods be that of a child
reported missing five years ago? Can a man convicted of rape fifteen years ago
be exonerated if the evidence used to convict him is re-tested today? The answer
to all of these questions is YES, all
of the above are possible with DNA testing technology and expertise available at
our laboratory.
Pharmacom offers the most up to
date technology available. All of our test methods are based on the Noble
Prize-winning PCR (Polymerase Chain Reaction) test. We are also one of the few
laboratories in the world that will test both for nuclear and mitochondrial DNA.
Thus, we can exam evidence as diverse as semen and bloodstains, hair shafts,
bone, teeth, fetal material and saliva stains. Soiled clothing, sexual assault
examination kits, skeletal remains, cigarette butts, teeth or even items such
knife handles that do not have any apparent stains on them are now all potential
sources of DNA evidence.
DNA (Deoxyribonucleic Acid) is the
molecule responsible for all inherited genetic traits. There are two types of
DNA found in each human cell (with the exception of red blood cells). They are
nuclear DNA and mitochondrial DNA. Nuclear DNA is found in the nucleus portion
of the cell. Each individual inherits one half of their DNA from their father
and the other from their mother. The majority of Forensic DNA tests performed
will analyze the nuclear DNA. Some tissues however, like bone and hair shafts,
contain small quantities of nuclear DNA, but have an ample amount of
mitochondrial DNA. This DNA is found in the cellular organelle called the
mitochondrion and is inherited only from the mother. Nuclear DNA is most likely
to be tested in such items of evidence as blood, semen or saliva stains or
criminal paternity cases. Mitochondrial DNA is useful in body identifications
when only bone or teeth are available or cases when analysis of a hair shaft of
unknown origin is requested. |