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10. Mr. Chatterjee, before parting with, has contended that prosecution could not obtain any hash value certificate to prevent any kind of tampering of the voice sample. In this regard, Mr. Chatterjee has referred to PW15 (voice expert) and thereby prosecution hopelessly failed to establish the case beyond reasonable doubt.

11. In support of his contention , Mr. Chatterjee has relied on the following cases:-

Mukut Bihari & Anr. Vs. State of Rajasthan reported in 2012 SCC OnLine SC 461 Arjun Pandit Rao Khotkar Vs. Kailash Vs. Kushanrao Gorantyal reported in (2020) 7 SCC 1 Soundarjan Vs. State Rep. by the Inspector of Police Vigilance Anticorruption Dindigul reported in 2023 SCC OnLine SC 424

31. Subhrat Kumar Chowdhury, Senior Scientific Officer, (HOD) Computer Forensic Division CFSL New Delhi, PW15 in his cross examination mentioned absence of hash value certificate of the voice recording which were tested. But, in his report he has clearly stated that Micro SD Card was original.

32. After delving into all the facts, circumstances, evidences adduced the following points of contentions are to be analyzed in order to secure the ends of justice.

33. The argument of the appellant regarding the doubtful verification of the complaint by the investigating officer is absurd as all the processes prescribed were properly complied with the relevant provisions of the CBI manual.