To begin with, law enforcement should be allowed to use DNA profiling in criminal investigations because it can help investigators figure out exactly who the guilty party is and it would eliminate false accusations. More than 2,000 people have been exonerated of serious crimes since 1989 in the United States, according to a report by college researchers who have established the first national registry of exonerations. Many people have been mistakenly accused and convicted of a crime, because of this law enforcement should be allowed to use DNA fingerprinting.
DNA forensics can also narrow down suspect pools, exonerate innocent suspects, and link crimes together if the same DNA is found at both scenes. However, without existing suspects, a DNA profile cannot direct an investigation because current knowledge of genotype-phenotype relation is too vague for DNA phenotyping. For example, a profile from a first time offender that has no match in any database may give the information that the criminal is a left handed male of medium stature with red hair and freckles. It would be impossible to interview every man who fits that description. However, with available suspects, DNA forensics has many advantages over other forms of evidence. One is the longevity of DNA. Although it will deteriorate if exposed to sunlight, it can remain intact for centuries under proper conditions (Sachs, 2004). Because DNA is so durable, investigators can reopen old cases to reexamine evidence.
There have been many cases over the years within in the criminal justice system where people have walked free from committing a crime as well as those being put behind bars for being accused of committing a crime they never committed. DNA testing in the criminal justice system can be the decision maker for someone who is either going to walk free from the crime they possibly committed or get put behind bars for a crime they may have not committed. DNA testing has been used to sentence hundreds and convict thousands of people across the country every year. DNA evidence is one of the best examples on how technology has made convicting the criminals who have committed a crime much easier than it has been done in the past. DNA evidence does not necessarily pinpoint the exact criminal on who have may commited the crime, but it does bring it down to a handful of the population who are being questioned for the crime. It is one of the most accurate ways of finding out evidence as long as it is properly done and handled correctly.
Today in the crime world, DNA evidence is strongly accepted in solving crime cases. This is all based in part by allowing a crime laboratory to have a designated unit whose main goal is to analyze DNA evidence to aid investigators with positive outcomes in crime case solving. With that being said we are going to discuss the functions of a DNA unit within a crime lab as well as address the vital role these units play in solving crime.
Due to the uniqueness of DNA it has become a powerful tool in criminal investigations
DNA is one of the most important pieces of evidence that a criminal justice agent can use in a court of law. There ae slim to no crimes committed that doesn’t have some type of DNA evidence left behind. Some DNA evidence could be, but not limited to, fingerprints, blood, hair, and any other bodily fluids. DNA is known as Deoxyribonucleic Acid, and is one of two types of molecules that encode genetic information (Medicine.net, 2017). DNA is characteristically unique to each person individually, unless they are a twin. DNA dictates a person’s look such as their eye color, blood type, height, hair color, skin color, etc. With this genetic information, intense testing can be done to find who may be connected to the genetic makeup of each stand
DNA evidence is extremely helpful in criminal trials not only because it can determine the guilt of a suspect, but also because it can keep innocent people from going to jail. The suspect must leave a sample of their DNA at the crime scene in order for testing to occur, but DNA can be found in the form of many things such as semen, blood, hair, saliva, or skin scrapings. According to Newsweek, "thousands of people have been convicted by DNA's nearly miraculous ability to search out suspects across space and time… hundreds of innocent people have also been freed, often after years behind bars, sometimes just short of the death chamber" (Adler ). Though some may think it is a waste of time to go
Before any release, there must be proper evidence showing that the accused had nothing to do with the crime. The introduction of the first person using DNA to prove his innocent was David Vasquez. In 1985, he was convicted, later in 1990; he was released due to DNA evidence (O’Leary, 2012). Since the Vasquez case, DNA testing has been a very powerful technique to use to prove a person’s innocence. A great reason for this is because victims are capable of lying and misidentifying.
So you ask, "How does this work to catch or release criminals?" DNA is very simple and small. Everyone has different patterns. Using certain machinery to detect a person's DNA solves these patterns. This evidence will create a future in crime scene investigation.
In order to analyze DNA, scientists require a sample of the individual being tested, such as blood, semen, or hair, before they can create a genetic profile of the person (Petricevic 1). Scientists can then analyze those samples using a
DNA analysis is a forensic tool that allows a suspect to be linked to a crime scene. Using the DNA analysis method, requires law enforcement officers to obtain DNA from the suspect and compare the suspects DNA,
What is DNA? Is it these winding strands that look like ladders or is it what gives a person blonde hair and blue eyes? Actually, DNA is both of these things. DNA is a person’s genetic makeup–their hereditary blueprint passed on by their parents. It is a part of almost every cell in the human body. In each cell, a person’s DNA is the same; it stays the same throughout their lifetime. DNA is found in skin tissue, sweat, bone, the root and shaft of hair, earwax, mucus, urine, semen, and vaginal or rectal cells. The DNA found in a person’s saliva is the same as the DNA found in their blood. Parts of the DNA determine our physical characteristics, such as eye and hair color, height, and bone structure, but the
DNA is deoxyribonucleic acid, which is found in almost all living things. DNA serves as a code for the creation and maintenance of new cells within an organism. Within humans, it is found in almost every cell. Although most of our DNA is found within the nucleus of our cells as nuclear DNA, a very small amount of our DNA is also found within the mitochondria as mitochondrial DNA. Because mitochondrial DNA is generally not used for solving crimes, for the purpose of this paper it will be disregarded.
Deoxyribonucleic acid (DNA) has been used to analyze and prove innocence or guilt of suspects of crimes with great accuracy. DNA is part of everyday life. It is the heredity material in humans and almost all other organisms. While being part of an investigation. DNA has helped to solve crimes. There is a couple ways that DNA left behind can be tested to solve a crime. Either if the suspect has been caught and or had his or her DNA tested, or if he or she has left behind any biological evidence. Which then needs to be tested to see if it matches the DNA found in the crime scene to his or hers DNA. The result to this comparison may help establish if the suspect committed the crime.
DNA forensics is a division of forensic science that focuses on the use of genetic material in criminal investigation to answer questions pertaining to legal situations, including criminal and civil cases. Through DNA testing, law enforcement officers are able to identify human remains or the individual responsible for a crime. DNA testing is a highly advanced scientific process that involves replicating the human DNA sequence to create a genetic map of an individual. Because of its reliability, DNA testing has become a significant factor in criminal cases. However, it has also been identified as having the potential to violate privacy and constitutional rights. The DNA identification process consists of five stages. These five stages