The Dna Missing Person

This paper explores deoxyribonucleic acid (DNA) collection and its relationship to solving crimes. The collection of DNA is one of the most important steps in identifying a suspect in a crime. DNA evidence can either convict or exonerate an individual of a crime. Furthermore, the accuracy of forensic identification of evidence has the possibility of leaving biased effects on a juror (Carrell, Krauss, Liberman, Miethe, 2008). This paper examines Carrells et al’s research along with three other research articles to review how DNA is collected, the effects that is has on a juror and the pros and cons of DNA collection in the Forensic Science and Criminal Justice community.

Due to the uniqueness of DNA it has become a powerful tool in criminal investigations

Before the 1980s, courts relied on testimony and eyewitness accounts as a main source of evidence. Notoriously unreliable, these techniques have since faded away to the stunning reliability of DNA forensics. In 1984, British geneticist Alec Jeffreys of the University of Leicester discovered an interesting new marker in the human genome. Most DNA information is the same in every human, but the junk code between genes is unique to every person. Junk DNA used for investigative purposes can be found in blood, saliva, perspiration, sexual fluid, skin tissue, bone marrow, dental pulp, and hair follicles (Butler, 2011). By analyzing this junk code, Jeffreys found certain sequences of 10 to 100 base pairs repeated multiple times. These tandem

In November of 1983, 15 year old Lynda Mann was found raped and murdered on a deserted road, and although police were able to obtain a semen sample from her murderer the case remained unsolved. In 1986 the killer struck again murdering 15 year old Dawn Ashworth, once again leaving behind semen, but this time the police were able to use DNA profiling to match the semen to a suspect. Colin Pitchfork became the first person to be caught based on mass DNA screening, and the first to be convicted based on DNA profiling. The use of Deoxyribonucleic Acid (DNA) in the criminal justice system has greatly tipped the scales in favor of law enforcement, and changed the world that we live in. Court cases that in the past relied heavily on eye witness testimony and circumstantial evidence now have science to back them up. DNA analysis has revolutionized the criminal justice system, and even though there are some flaws, the use of DNA evidence should continue to be used by law enforcement.

and could get up to 50 years in jail if convicted of rape and kidnapping.

The guns bullets at Tyrell’s house matched up with the ones at the crime scene.

DNA profiling was at first made as a framework for choosing paternity, in which tests taken under clinical conditions were examined for innate affirmation that could association watchman to adolescent. It initially progressed into the courts in 1986, when police in England asked sub-nuclear analyst Alec Jeffrey’s, who had begun looking at the use of DNA for wrongdoing scene examination, to use DNA to check the confirmation of a 17 year-old child in two ambush murders in the English Midlands. The tests showed the youngster was frankly not the offender and the genuine attacker was over the long haul found, furthermore using DNA testing.

DNA Database In 1974, a 19 year old man named James Bain was wrongly convicted of both rape and kidnapping. He was accused of raping a little boy on a baseball field in Florida. A piece of DNA was left at the scene, but the trial occurred before DNA testing was available. Although Bain could not be directly linked to the piece of DNA, blood types could be compared.

By looking at my results, suspects 1 and 4 did not commit the crime. My other lab assistants tested suspects 2 and 3, and suspect 3 was the one who committed the crime. When looking at the DNA test, suspect 3’s DNA matched up almost perfectly, while the suspect’s DNA I tested (1 and 4) did not match up, and were not in the same location. The bands in the DNA test between the crime scene and the suspect 3 matched up almost perfectly. When looking at the crime scene DNA, the distances were 21mm, 23mm, and 31 mm, and when looking at suspect 3, the distances were 21, 23, and 30. Suspect three was the closest match to the crime scene. The distances for suspect 1 and 4 were nowhere near the same distances as the crime scene DNA. Please ask my lab assistant Nathan for the results of the DNA of suspect 3.

Before the 1980s, courts relied on testimony and eyewitness accounts as a main source of evidence. Notoriously unreliable, these techniques have since faded away to the stunning reliability of DNA forensics. In 1984, British geneticist Alec Jeffreys of the University of Leicester discovered an interesting new marker in the human genome. Most DNA information is the same in every human, but the junk code between genes is unique to every person. Junk DNA used for investigative purposes can be found in blood, saliva, perspiration, sexual fluid, skin tissue, bone marrow, dental pulp, and hair follicles (Phillips, 2008). By analyzing this junk code, Jeffreys found certain sequences of 10 to 100 base pairs repeated multiple times. These tandem repeats are also the same for all people, but the number of repetitions is highly variable. Before this discovery, a drop of blood at a crime scene could only reveal a person’s blood type, plus a few proteins unique to certain people. Now DNA forensics can expose a person’s gender, race, susceptibility to diseases, and even propensity for high aggression or drug abuse (Phillips, 2008). More importantly, the certainty of DNA evidence is extremely powerful in court. Astounded at this technology’s almost perfect accuracy, the FBI changed the name of its Serology Unit to the DNA Analysis Unit in 1988 when they began accepting requests for DNA comparisons (Lewis, 1989).

Because no has no same DNA that what make so unique in characteristics. Back in the 80's technology wasn't as good as it now and a lot of people have been sent to prison for crime they didn't commit. Now with the change of technology cold cases has been reopened and solved and people who were sent to prison for crimes they didn't commit are now being exonerated do to DNA evidence and the change of technology. DNA play a huge role in the criminal justice system and without the use of DNA to solve crimes I believe that a lot crimes wouldn't be able to be solved. Good post!

The use of DNA databasing is not only a controversial subject, but a very complex one. On the surface, the Fourth Amendment seems to guard against keeping a database full of individual’s DNA without their will. However, DNA databasing has been used successfully to solve crimes, as well as prove people’s innocence. Does this fact allow investigators to use DNA without a person’s full consent for the greater good? The concept of bodily autonomy says no, but laws and court cases have been interpreted as to say keeping DNA databases are lawful. The morality of keeping DNA databases are up to interpretation of various factors.

In my opinion, the greatest scientific advance in history that had the greatest impact on forensic science is DNA profiling. Since the ability to analyze DNA was discovered, it has served to be a tremendous tool, leading to the arrest of thousands of suspected criminals. Also, in addition to helping law enforcement in the effort to catch suspects, DNA profiling has lead to numerous exonerations of those who previously were found guilty and sentenced for a crime. Another scientific advance that greatly benefitted modern forensic science were advancements in chemistry and the analysis of chemicals and substances. With the ability to analyze carpet fibers, strange powders or any material, a forensic scientist can tie a crime to a specific location

DNA stands for deoxyribonucleic acid. it's the genetic code that determines all the characteristics of a living aspect. ... each nucleotide contains a sugar and a phosphate molecule, which make up the 'spine' of DNA, and, one of 4 natural bases. The bases are adenine (A), guanine (G), cytosine (C) and thymine (T). DNA fingerprinting is a revolutionary technique that enables scientists to match minute tissue samples and facilitates scientific studies on the composition, reproduction, and evolution of animal and plant populations. As a device for fantastic identification of criminals, it plays a particular function in forensic technological know-how. DNA Fingerprinting is a realistic manual to fundamental principles and laboratory methods as

It is well understood that DNA is useful in the criminal justice system, whether it is rape and murder case to prove paternity for the sake of civil cases or the identity of the missing person. The value and reliability of DNA is manifested in science and justice because DNA took part to help and facilitate the criminal proceedings. However, the DNA used also the risk of reliability when it is created by an act of false police collected evidence from the crime scene.The police officer must protect and recognize the crime scene.