DNA in Criminal Investigations



DNA in Criminal Investigations

Introduction

A person's traits such as bone density, stature, color of the hair, color of the eye are determined by a narrow and long string-like material called DNA. To solve crimes previously thought to be impossible to solve, enabling the criminologist are the recent advancements in technology of DNA. In any type of case this seemingly evidence, that is invisible, may be used. Worldwide, across the state or even within a district, DNA is routinely used to link cases, similar to fingerprints. To prevent leaving behind a fingerprint, a perpetrator may put gloves on his hands. To not leave behind some DNA, is much more difficult, however. It may be found in biological fluids such as semen or blood, a single hair from virtually any part of the body, perspiration on a discarded piece of clothing, skin cells shed by scrape or a bump, and on a stamp in saliva. A few years ago, in ways which were depicted only on television, forensic advancements have now made it possible to use the DNA.

Discussion

From virtually anywhere can, DNA evidence, be collected. For example, by analyzing the DNA sample extracted from the saliva left by the culprit in the dental impression of bit spot on the victim, the forensic experts can identify the culprit. Similarly, by matching the DNA (Williams, 2008). Though this process does take some time but it helps the investigating authorities to put a name on the masked criminal that was suspected of committing the crime. The area about the mouth of ski masks, bubble gum, postage stamps, and even cigarette butts, are used to analyze saliva on, now commonly for DNA. For a positive match, sufficient evidence may be provided by DNA examination of a single hair, though in the past a root ...