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How Technology & Science Have Impacted Forensics In Criminal Investigations
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The world of forensic science has evolved incredibly large during the past century, and it couldn’t have been done without the life-changing discovery of fingerprints. With most of the credit going towards Francis Galton, the discoverer of fingerprints, scientists have advanced the Fingerprinting world so greatly, the chances of failing to identify a human through the ridge patterns on their fingertips is nearly impossible. DNA Fingerprinting, a method of forensic science, is a reliable technique that has been around for centuries that accurately compares fingerprints at crime scenes to the rightful owner. Since the early 20th century, research has proven that DNA fingerprinting is the leading form of crime scene forensic investigation and has solved more cases than any other method of investigation. DNA fingerprinting in the 21st century is relied upon so much due to the various types of materials and technologies used, the vast amount of mysterious cases solved, and most importantly, the accurate results the method offers.
Francis Galton discovered that three different types of fingerprints exist: patent, plastic, and latent fingerprints which are in order from easiest to most difficult to examine. The first type of print is called a patent print, which is the easiest print to locate. If you were to ask a crime scene investigator which fingerprints they would most prefer to find at a crime scene, the majority of the time, the answer would be patent prints, as they require the least amount of effort to locate and can be seen without any technology. Patent prints occur when a person has a substance on their fingers such as grease, paint, blood, or ink that leaves a visible print on a surface, making them easily visible. The type ...
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"Forensic Science." DNA Fingerprinting. N.p., 2014. Web. 04 Apr. 2014.
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Burger, Dan. "New Fingerprint Technology IDs the Bad Guys Faster than Ever." Police One. N.p., 21Jan.2004.Web.05Apr.2014..
Question: Everyone in Canada should be fingerprinted and photographed to make law enforcement easier. Please provide an argument for and an argument against.
James, Stuart H., and Jon J. Nordby. "Fingerprints." Forensic Science: An Introduction to Scientific and Investigative Techniques. Boca Raton, FL: CRC, 2005. 341-60. Google Books. Web. 27 Feb. 2014.
...the unknown print or some other person could have made it. The bottom line is that only one person could leave the unknown print. It is the responsibility of the fingerprint expert performing a comparison to reach this conclusion. Therefore, fingerprint identification is based on sound scientific principles.
Nowadays, DNA is a crucial component of a crime scene investigation, used to both to identify perpetrators from crime scenes and to determine a suspect’s guilt or innocence (Butler, 2005). The method of constructing a distinctive “fingerprint” from an individual’s DNA was first described by Alec Jeffreys in 1985. He discovered regions of repetitions of nucleotides inherent in DNA strands that differed from person to person (now known as variable number of tandem repeats, or VNTRs), and developed a technique to adjust the length variation into a definitive identity marker (Butler, 2005). Since then, DNA fingerprinting has been refined to be an indispensible source of evidence, expanded into multiple methods befitting different types of DNA samples. One of the more controversial practices of DNA forensics is familial DNA searching, which takes partial, rather than exact, matches between crime scene DNA and DNA stored in a public database as possible leads for further examination and information about the suspect. Using familial DNA searching for investigative purposes is a reliable and advantageous method to convict criminals.
Another discrepancy between actual forensics and how it is portrayed in the media is the availability of information in databases. There is only a small percentage of the entire population’s fingerprints or DNA samples stored within databases such as the Integrated Automated Fingerprint Identification System (IAFIS). This makes finding a match between a DNA sample or fingerprint difficult, as a match would only be found if the person’s information was already stored within the database. If there is no match previously stored in a database, the fingerprint or DNA sample could be potentially rendered useless within a trial. Typically, in order to perform an analysis, investigators must already have a suspect in mind and request a DNA or fingerprint sample from him or her. If the suspect does not want to provide one however, the sample collected as evidence may not count as valid. The CSI effect creates an idealized image that all crimes can be solved with a hair or drop of blood, but this is not always the case in real life.
DNA is a vital tool in forensic medicine, when it comes to tracking down that killer or finding that liar in the courtroom. However, DNA fingerprinting for example is also used to identify what a person did based off of their remains. “The U.S. military takes blood and saliva samples from every recruit so it can identify victims of mass disasters such as airplane crashes.” (Marieb, 2009, p.459). After the 9/11 attacks,
The easiest way to figure out who was at the crime scene is by taking fingerprints. Good impressions such as fingerprints can be the most valuable pieces of evidence in a forensic investigation. Impressions help link a person to a crime scene or crime as well can provide information on any weapon that could've been used at the scene. An educated technician would compare and search fingerprints manually and on AFIS computer system for classification, comparison and identification. "Analyzing evidence is not a quick or simple process.
In 1893, Francis Galton introduced a remarkable new way to identify people ("Fingerprinting" pg 1 par 3). His observation that each individual has a unique set of fingerprints revolutionized the world of forensics. Soon, all investigators had adapted the idea to use fingerprints as a form of identification. Unfortunately, over the course of the past century, criminals have adapted to this technique and seldom leave their incriminating marks at the crime scene. Forensics specialists were in need of a new way to identify criminals, and DNA provided the answer. When it comes to genetic material, it is virtually impossible for a criminal to leave a crime scene "clean." Whether it is a hair, flakes of skin, or a fragment of fingernail, if it contains genetic material then it has potential to incriminate. However, there are still concerns regarding DNA fingerprinting. What are the implications of using these tests in a courtroom scenario? What happens when DNA tests go awry? It is debatable whether or not DNA fingerprinting has a place in America's court systems.
DNA fingerprinting, or sometimes known as DNA typing, is isolating and developing images of sequences of DNA to evaluate the DNA in an individual’s cells. DNA fingerprinting today is used for many different things in many different areas of science. In forensic science, DNA typing can determine which person did which crime by using blood or skin left at a crime scene. In medical science, patients can find out who their siblings, parents, or children are by using DNA fingerprinting (webmd).
Forensic genetics has other applications . The " fingerprint " DNA represents a valuable tool for forensic science . As is the case with an ordinary fingerprint genetic fingerprint is unique to each individual (except identical twins ) . The determination involves the observation of specific DNA sequences which can be obtained from extremely small tissue samples , hair, blood or eventually left at the scene . As Fifty microliters of blood, semen or five microliters of ten roots of hairs are enough , and nozzles secretions and cells from the fetus . In addition to its use in the capture of criminals , especially rapists , the genetic fingerprints can be used to establish family relationships . People involved in the conservation of species use them to be sure that captive breeding is among individuals who do not belong to the same family .
Once a crime has been committed the most important item to recover is any type of evidence left at the scene. If the suspect left any Deoxyribonucleic acid (DNA) at the crime scene, he could then be linked to the crime and eventually charged. A suspect’s DNA can be recovered if the suspect leaves a sample of his or her DNA at the crime scene. However, this method was not always used to track down a suspect. Not too long ago, detectives used to use bite marks, blood stain detection, blood grouping as the primary tool to identify a suspect. DNA can be left or collected from the hair, saliva, blood, mucus, semen, urine, fecal matter, and even the bones. DNA analysis has been the most recent technique employed by the forensic science community to identify a suspect or victim since the use of fingerprinting. Moreover, since the introduction of this new technique it has been a la...
The three different main types of fingerprints are Loops, Arches, and Whorls (Jackson 1). Henry Faulds is known as the Father of Fingerprints and developing fingerprints (Jackson 1). His discovery of fingerprints has made a huge impact not only in his time but, in Modern Crime Scene Investigation (Jackson 1). Without fingerprinting, it would be very difficult to convict criminals of crimes and very hard to try to process information. Crime Scene Investigators make a huge impact in Forensic Science. We need CSI workers, without them people could only imagine what crime would be like not only in our community, but in our
The use of technology in the policing domain has been rapidly adopted over the past few years. However, it should be noted that the process of adopting and effectively using technology in law enforcement, begun more than 50 years ago. For instance, it become apparent in the 1950’s that computer would enable easier storage and retrieval of large amounts of data. More recently, advancement in technology has incorporated more sophisticated ways of transmitting and analyzing information, therefore aiding the law enforcement process (Button, Sharples & Harper, 2007). The police have found various aspect of technology useful; predominantly, computer crime mapping has been widely adopted and consequently received a lot of attention (Goldstein & McEwen, 2009).
Crime investigators have the job to solve crime and find the suspect responsible. Sometimes the offense is very difficult to solve, but with the right pieces of evidence and tools, the investigation can be answered a little more easily. The use of fingerprints is a main tool used at crime scenes. Investigators find these at the actual crime scene and analyze them at the lab to determine whom the prints belong to. Each person has an individual print which is why this is a very useful piece of evidence. Sir Francis Galton found that the prints could be categorized into different types as well as different groups. The research of fingerprints from decades before has shaped the way detectives identify suspects and victims.
...Mrs. Hiller found her husband dead. Investigators found some particles of sand and gravel by the daughters bed. They also found the fingerprints of the convicted killer Thomas Jennings, on the Hiller homes railings. Mr.Hiller had painted the railings hours before his death. Into the paint was four fingerprints of someone’s left hand. American Law enforcement had already adopted the principle of fingerprinting so the evidence was allowed to be presented in court. Fingerprinting expert William M. Evans had agreed that Jennings hand, his alone, was the prints left on the railing of the Miller’s home. The courts jury appealed Miller as guilty and he was later hanged. Fingerprinting is fairly new and they’ve helped find the culprit in many investigations carried out in America, therefore proving that our methods in solving crimes are better than the methods used before.