. DNA can be left behind or collected from hair, saliva, blood, mucus, semen, urine, fecal matter, and even bones. DNA analysis has been the most recent technique used by the forensic science community to identify a suspect or victim from the use of fingerprints. Furthermore, since the introduction of this new technique, large numbers of people have been released or convicted of crimes based on DNA left at the crime scene. DNA is short for deoxyribonucleic acid. DNA is the genetic material present in the cells of all living organisms. Humans contain approximately one trillion cells (Aronson 9). DNA is a long double helix-shaped strand made up of small building blocks (Riley). There are four types of construction. Repeating segments are cut from the DNA strand by a restrictive enzyme that acts like scissors, and the resulting fragments are selected by electrophoresis (Saferstein 391). However, there are some drawbacks to using the RFLP method in the forensic science community. The RFLP technique requires a large amount of DNA and must be of high quality and cannot be degraded (Jones). Forensic scientists and law enforcement determined the need for a DNA profiling method that could be used on smaller DNA samples. Therefore, the RFLP technique has been almost entirely replaced by the polymerase chain reaction. PCR or polymerase chain reaction is not a DNA typing technique, but a variety of different DNA tests (Riley). PCR duplicates and increases the quantity of a DNA strand, which is advantageous for forensic scientists faced with a small amount of materials (Saferstein 394). The introduction of PCR-based tests into DNA analysis required scientists to move to smaller targets that had the same repetitive variation (Jones). This is how short tandem repeat, the latest method of DNA typing, was born. In 1989, due to numerous scientific and legal issues, the National Research Council Committee on DNA Technology in Forensic Sciences (The Evaluation of Forensic DNA Evidence) was developed. The key role of the National Research Council has been to analyze statistical and population genetic issues in the use of DNA evidence and to review major alternative approaches to the statistical evaluation of DNA evidence (The Evaluation of Forensic DNA, 50) . Over the past fifteen years, DNA profiling has made tremendous progress and continuous improvements in the fight against violence