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.
I was asked yesterday has to what makes confidential informant (Human Source) training provided by HSM Training different from other providers. I wasn’t quite sure where to start. Then it dawned on me that it doesn’t actually start with us, it starts with the customer and what they need. And what they need is not always what they want.