Here is a recent court judgement coming from the Supreme Court in New York State relating to the use of an informant and establishing probable cause.
This document contains quite a few references to other cases on which the judgement was based.
Informant Case Law Boston - Protecting the identity of a confidential informant
We are always studying recent court judgements with regard to protecting the identity of an informant. Here is the ruling from Massachusetts where the court ruled to protect the identity of an informant.
Officers managing informants need to read this type of judgement in order to protect informants properly.
