102 was uploaded by the accused person without the permission from P.W. 1. So, the clear picture comes before this court now. That with the IP address 47.15.15.236 the nude videos of the P.W. 1 was uploaded to the website www.pornhub.com including the alleged URL which is mentioned by P.W. 1 in his written complaint and this IP was allocated to the mobile number 8240136385 when the video was uploaded to the server of pornhub and this mobile number is registered in the name of the accused of this case Animesh Boxi. Moreover this court finds that the alternate number which is +919733185096 and +91 is the country code of India and so the ten digits of mobile number is 9733185096 and this is the same mobile mobile which the accused Animesh Boxi had mentioned in his admission form and with this mobile number Animesh Boxi had opened the bank account. This court further finds from exhibit 1 the defacto complainant had mentioned the mobile numbers of the accused 9733185096 and 8240136385 through Animesh Boxi used to talk with her. In this context Ld. Special PP submitted that Paul L. Kirk expressed the principle Locard's Exchange Principle as follows: "Wherever he steps, whatever he touches, whatever he leaves, even unconsciously, will serve as a silent witness against him. Not only his fingerprints or his footprints, but his hair, the fibers from his clothes, the glass he breaks, the tool mark he leaves, the paint he scratches, the blood or semen he deposits or collects. All of these and more, bear mute witness against him. This is evidence that does not forget. It is not confused by the excitement of the moment. It is not absent because human witnesses are. It is factual evidence. Physical evidence cannot be wrong, it cannot perjure itself, it cannot be wholly absent. Only human failure to find it, study and understand it, can diminish its value". In forensic science, Locard's exchange principle holds that the perpetrator of a crime will bring something into the crime scene and leave with something from it, and that both can be used as forensic evidence. Dr. Edmond Locard, a pioneer in forensic science had formulated the basic principle of forensic science as: "Every contact leaves a trace".