Volume 1 and 2 of this book “Police Investigation – Powers, Tactics and Techniques” together constitutes a single book. Volume 1 contains 1 to 14 chapters and Volume 2 has Chapter 15 to Chapter 25 with Annexures. This book will be regarded as a benchmark and best-practice model and would continue to be regarded as the ‘Bible’ for professional investigation in India. May the Indian Police conduct investigation in a better manner, the Advocate conduct the trial in an earnest way protecting his genuinely aggrieved client and the Judicial Officer deliver impartial justice in a fair manner without any prejudice or compulsion. After going through this book, may the Indian Police earn the appreciation of all citizens of India and the international community for achieving the status of world-class competency in protecting the citizens and their properties, bypassing the name and fame earned by even the London Bobbies. For the discerning investigating Police Officer, this book may not be an option, but rather a necessity – a vade mecum.