Forensic science is a dynamic field of knowledge and skills which can be highly helpful and useful for criminal investigation. Forensic scientific technology has revolutionized the modes of investigation of crimes. The modern invention of science and technology shall have serious impact on the law and the administration of justice in any country. Forensic scientific evidence is based on application of scientific theory which involves a variety of other natural sciences. The evidence collected by adopting scientific techniques through forensic test result establishes a fact or truth at trial before a court of law. The proper settling of legal disputes and detection of crime with the help of science depends not only on its reliability but also in the correct application of the theory and technique in a particular case during trial. Keywords: Forensic Scientific Evidence, Reliability, Admissibility, Crime scene investigation