Digital Evidence Investigation Manual issued by CBDT
https://drive.google.com/file/d/0B5vWGtQ14k1BaHdBdkl6T3hVLWs/view?usp=sharing
http://www.lawweb.in/2014/12/digital-evidence-investigation-manual.html (http://www.lawweb.in/2014/12/digital-evidence-investigation-manual.html)