A crime has been committed. The perpetrator thinks that it is the perfect crime. He walks away believing that there were no witnesses and that no evidence has been left behind. However, he is wrong. Forensic science is a silent witness to every crime. It is impossible for a criminal to act without leaving behind some sort of trace evidence, even if it is so minute that the most modern technology is necessary in order to find it. This is where forensic science comes into play.
Forensic science is a very diverse field, involving the work of pathologists, anthropologists, entomologists, toxicologists, mathematicians, artists, engineers, psychologists, etc. Forensic science can be defined simply as the application of science to law. Forensics can be used in a variety of situations such as civil cases, law violations in terms of food, drink, and medical manufacture, and even to determine if countries are developing nuclear weapons.
However, forensic science is generally used in the investigation of criminal cases involving a victim, such as assault, robbery, kidnapping, rape, and murder (1).
Forensic science is used in every part of the criminal investigation, from crime scene investigation to proving the guilt of the perpetrator. The forensic process begins at the crime scene. The crime scene investigation "should be done in a careful and methodical manner." (5) The crime scene is composed of any area in which the perpetrator or the victim was present. If there are drag marks, tire tracks, shoe prints, etc., these things must be part of the crime scene, as would be anywhere in which the perpetrator moved the body, such as from a home to a river or wooded area. The examination begins at the outermost part of the crime scene working inward towards the body in an extremely meticulous manner in...