Criminal investigation should be able to answer all question relating to 5Ws and H that are who, what, when where, why and how. Methods of inquiry should be based on gathering evidences that are observable, measurable and empirical in nature. These evidences should be subjected to rational principle of reasoning. They should be able to extract enough information about the case in hand that they lead to the formulation of a judgment and opinion, significant enough to be presented in the court of law. It is considered as a part of the scientific method ...