For forensic purposes, the Nikon authentication software is wonderful in that there is no "negative" to place on file for later reference, and this creates one. I am asking -- not poking at the client -- but why is B&W a requirement, other than the fact it was probably the way it was always done? I'd sure check with the state police, etc., wherever you are, or someone who does crime scene photography for the police and ask the wheres and whyfors. They will know in your jurisdiction. It seems to me that they don't want any PPing to prevent possibility of someone doing a "content aware" trick on them. But the law is often strange, and decades behind on things outside of its realm. Of course, there is always what we call the "golden Rule:" the man with the gold makes the rule.