DNA Evidence an Important Part of Crime Solving Today

A short tandem repeat (STR) is the process of evaluating a specific region of DNA, which is why it may be inaccurate. (National) Institute of Justice 1). DNA profiles extracted from samples collected during short tandem repeats are not unique to a single person because they are derived from a small fraction of human DNA (Haesler 2). Y chromosome analysis is used for the analysis of mixed samples of biological evidence, but women have no Y chromosome and can only be used for analysis of male DNA samples.

DNA is often used to solve crime in one of two ways. In the case of a suspect, you can compare that person's DNA sample with evidence of the crime scene. The result of this comparison will help you judge whether the suspect committed the crime. If suspects have not been discovered yet, you can analyze the biometric evidence at the crime scene and compare it with the criminal file in the DNA database to help identify the criminal. Evidence of crime scenes can also be linked to other crime scenes using DNA databases.

DNA evidence has become an increasingly powerful tool to solve crime problems. The cost of DNA analysis from biological evidence gathered from crime scenes is decreasing, new technologies are more prevalent, and the criminal justice system is learning to use DNA evidence more effectively . Local law enforcement agencies (police, crime laboratory, prosecutor) and NIJ are conducting DNA field experiments in five communities of Los Angeles, Topeka, Denver, Phoenix, Orange County (California). The purpose of this survey was to judge whether the use of DNA in general property criminal investigation is cost effective

News coverage praises the success of using DNA to resolve crime. For example, in 1999, New York authorities linked DNA with at least 22 sexual assaults and robbers threatening the city with DNA evidence. In 2002, the authorities of Philadelphia, Pennsylvania, and Fort Collins, Colorado used DNA evidence to contact and resolve a series of crimes committed by the same individual (rape and murder). In 2001 the "Green River" killing, DNA evidence became a major breakthrough in a series of crimes that have not been solved for many years, despite the investigation of a large number of law enforcement working groups and the $ 15 million investigation.