The aim of writing article in hand is to critically determine whether in our legal system any attention is paid towards recovering, preserving, collecting, and covering the documentary and digital evidence and using modern techniques to analyze it sufficient to ensure its admissibility in national and international courts. This article has completed this task by conducting a purely qualitative study of case laws and critically examining 2014 international protocols documentation and investigation of sexual assault cases. The main objective of this research is four-folds. First are what standards followed internationally for this purpose. Secondly, to review case laws in which guidelines are provided for documentary physical and digital evidence? Thirdly to deeply analyze those new techniques up to what extent are followed in Pakistan. Fourthly and finally to recommend /suggest that new techniques of Forensic, namely chromatography, should broadly be used in the investigation not only in whitecollar crimes but as well as in other civil and criminal cases.