Evidence can come from diverse sources such as from genetic material or trace chemicals to dental history or fingerprints. Evidence can serve many functions in any investigation, such as to trace an illicit substance, to identify remains or to reconstruct a crime. It supports the enhancement and creation of tools and techniques to identify, collect, analyze, interpret and preserve evidence.
Individuals involved in the field of forensic science are part of an ancient tradition where the facts of legal matters are thoroughly analyzed in scientific manner to gain pertinent information that can ultimately be used in an investigation and subsequent prosecution. The evidences are then analysed and classified to document the observation. Forensic scientists who store the evidences work in close coordination with the attorneys, law enforcement and medical examiners. In order to restructure a crime scene, scientific methods are used to facilitate analysis of physical evidence, which is important in minimizing manual inaccuracies (Stuart,