Dna And The Criminal Justice System

872 WordsMay 10, 20164 Pages
Deoxyribonucleic Acid, otherwise known as DNA has played a crucial part in many investigations both past and present. It can be used to identify criminals when there is evidence left behind with incredible accuracy. DNA evidence is taken seriously enough that it can exonerate, or bring about a conviction. In Today’s society DNA evidence and technology is vital to the criminal justice system by ensuring accuracy and fairness. In 1984, Alec Jeffreys of the University of Leicester discovered a new marker in the human genome. DNA is generally the same in all human beings with an exception to the “junk code” that is unique to every person. Junk DNA in investigations can usually be found in saliva, blood, skin tissues, semen, skin tissue, and hair. Jeffreys proved that even small fragments of DNA molecules were unique to an individual with the exception of monozygotic twins. Due to his discovery, many older and unsolved cases from the "pre-DNA" era are being re-opened and subjected to DNA testing with the hope of solving them. (Nelson, M. (2011) Due to the uniqueness of DNA it has become a powerful tool in criminal investigations as it can involve, or exempt a suspect. It can also be used to identify the remains of dead bodies through comparison with the DNA database. It can also be compared to other crime scene evidence so as to connect the crimes to a particular perpetrator whether it be local, countrywide, or
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