Some of the most likely evidence that is presented in criminal cases comes from the FBI crime research laboratoryoratory in Quantico, Va. Part of their job is to test and analyze everything from ballistics to desoxyribonucleic acid for state and local prosecutors around the country. For years, the FBI believed that lead in dopes had odd chemical signatures, and that by breaking them down and analyzing them, it was possible to touch bullets, not just to a single batch of ammunition, tho to a single box of bullets.
Expert testimony or so bullet lead comparisons has been introduced into court without significant contest for close to 40 years; however recent studies have capable severe flaws in the basic theory, assumptions, and deductions of bullet lead experts.
The FBI freshman used bullet lead analysis while investigation the assassination of John F. Kennedy, trying to match pieces of bullets with those found in Lee Harvey Oswalds rifle. By the 1980s, the FBI was routinely using this analysis to interrelate bullet fragments found at a crime pellet with bullets found in the possession of a suspect.
While quieten working at the FBI, metallurgist William Tobin began questioning this practice.
Tobin says the Quantico lab was the only place in the country that did bullet lead analysis, and the trust that you could actually match a bullet fragment to a specific batch or box of bullets went unchallenged for 40 years until Tobin retired and decided to do his own study, discovering that the basic predate had never actually been scientifically tested.
In 2002, confronted with Tobins study, the FBI lab asked the National Academy of Sciences to conduct an independent review of comparative degree bullet lead analysis. The National Research Council came out with a report calling into question years of FBI testimony. It found the assume the FBI used for interpreting results was deeply flawed and that the conclusion that bullet fragments could be matched to a box of ammunition so...If you want to scramble a full essay, order it on our website: Ordercustompaper.com
If you want to get a full essay, wisit our page: write my paper
No comments:
Post a Comment