No knock warrants are a tactic available to police that has be subject to much scrutiny. Here is a story from St Louis which resulted in the death of a 63 year old man. No knock warrants are intended to be used where there is a greater risk to the officers executing the warrant. This article focuses on the involvement of confidential informants in obtaining the warrant.
Human Sources - Managing Confidential Informants NEW BOOK COMING SOON
Human sources, also known as confidential informants, are an essential law enforcement resource in the fight against crime and terrorism. How they are managed has changed little over the years. This book provides law enforcement with details of how to manage human sources, in line with the goals of intelligence-led policing.
Confidential Informant Management - The Need for Dedicated Source Units
An extract from our forthcoming publication HUMAN SOURCES: MANAGING CONFIDENTIAL INFORMANTS. It will be out in July and details the structures need to manage human sources safely and more effectively In the meantime here is a section on the need to mage sources using dedicated officers in Dedicated Source Units.