Introduction to Forensic Investigations

2352 WordsJan 20, 201410 Pages
Locard’s Exchange Principle and the use of Fingerprints: Edmond Locard (1877-1966) was a French scientist specialised in both medicine and law. Inspired by the work of Hans Gross, it was Edmond that created the concept that all objects of any material should leave traces of itself upon whatever it touches, even if it is the minutest amount, simply put as “Every Contact leaves a trace,” Locard (1923). This is commonly known as Locard’s Exchange Principle. He believed that in circumstances such as a crime, his principle could be used to find evidence of who and perhaps even how that crime was committed by finding small materials, either physical or chemical at the scene of the crime that would directly link back to the offender.…show more content…
Even when they get packed away in boxes they could chip on the handle. Everything can affect an objects uniquness. If a window is pryed open to gain entry to building, the screwdriver used to pry it open will share different properties to every other. By studying the `striation` marks on a window, we will clearly be able to see that there are a certain number of grooves that make the mark. By comparing this to the screwdriver that was found in a suspects house, this could show that this was the screwdriver was used in the offence. This could then be used as evidence in court to prosecute the said suspect. Individualisation is pretty much based upon inductive reasoning; which is used a lot in Forensic Investigations. By saying we have never seen two screwdrivers the same leads us to believe that there are no two screwdrivers in the world. The same refers to the uniqueness of fingerprints, a pair has never been found; but if a pair was ever to be found, this would mean the entire theory of individualisation would fall apart. Referring back to Popper’s work on falsifiability, is it possible to prove that this theory can be wrong? In order to do so you would have to check every single item of that class ever made in great detail. This is too much to check on and so there is no way we can prove this test to be false. Paul Leland Kirk believed that individualisation was a key idea in Forensic Investigations and stated that
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