38 case which P.W. 15 stamped, marked and initialed as “J”, “J1” and identified the document (exhibit 13/3) and his signatures and office seal (exhibits 13/6 and 13/7). P.W. 15 examined membership form for Central Library of B.B.I.T. containing admitted writings and signature said to be of Animesh Boxi encircled and marked by the I.O of the case and P.W. 15 stamped, marked and initialed as “K” and identified the said document (exhibit 14/2) and his signature and office seal (exhibit 14/4). P.W. 15 also examined one Book Bank Card of B.B.I.T., of Central Library containing admitted signature said to be of Animesh Boxi encircled and marked by the I.O of the case and P.W. 15 stamped, marked and initialed as “L” and identified the document (exhibit 15/2) and his signature and office seal (exhibit 15/4). P.W. 15 had examined one Book Card of B.B.I.T., of Central Library containing admitted signature said to be of Animesh Boxi encircled and marked by the I.O of the case and P.W. 15 stamped, marked and initialed as “M” and identified the document (exhibit 16/2) and his signature and office seal (exhibit 16/4). P.W. 15 stated that he had examined all these documents containing writing and signatures with the help of scientific appliances such as different types of magnifying lenses, stereoscopic microscope, video spectral comparator 6000 under different lighting arrangement considering all aspects of document examination including analysis, interpretation and evaluation of data occurring in them to judge the writing habit of the writer and had prepared a report containing three pages and put his signatures and seal in each of the pages and it was typed by Jay Kumar Ghosh who is official typist and who typed in his presence and under his direction and identified the opinion report containing three pages dated 14/9/2017 (exhibit 37) and his signatures along with dates and official seal (exhibits 37/1, 37/2 and 37/3) and stated that according to his opinion report under the heading “agreements” significant individual characteristics of writing features were given and his opinion was the person who executed the admitted writings and signatures marked “J”, “J1”, “K”, “L” and “M” also executed the writings and signatures marked “I”. P.W. 16 happens to be SI posted at CID, Cyber Crime Cell, West Bengal who stated that he could recollect the incident of 29/7/17 and on that day in the afternoon Inspector Atanu Santra, I.O. of this case in connection with Panskura P.S. case no. 381/17 brought the remand