“Every contact leaves a trace” was theorized by Dr Edmond Locard which is famously known as Locard’s exchange principle. When contact between two objects takes place, it leaves some transfer between the purpose. Forensic scientists use cutting-edge scientific techniques to examine and interpret evidence in connection with civil and criminal proceedings. In criminal law, forensics science can help prove the guilt or innocence of the defendant. In civil actions, forensics can help resolve a broad spectrum of legal issues through the identification, analysis and evaluation of physical evidence. Forensic science draws upon a variety of scientific disciplines, including biology, physics and chemistry.