Having read a few books on this subject I can definatly say that this is the most comprehensive and unbelievably thorough book on this subject.
Every eventuality is catered for and analysed in depth with very helpful mnemonics, hints and tips.
Eric Shepard has wrote an amazing book that I wished I had going through Police training. However, no matter what training you have had, be it tier one or tier five you will benefit from this book.
It is well written in an accessible format that allows the reader to dip in and out as necessary.
Too often Officers go in to interviews poorly prepared and lose the most vital opportunity in the investigation.
This book however is not just about suspect interviews, it covers statement taking and ways to improve on this including the memory and it's part in the process as well as ensuring you maximize the full potential of witnesses.
I can't stress enough how much you WILL benefit from this book, you will not be disappointed.