Since this is the FBI/other feds pushing local and state law enforcement to not reveal what a stingray does, or when it's used, we have to ask... What's so special about what a stingray does that they want to hide it so bad? Given the history of the FBI, stingrays probably do something that's pretty obviously a 4th Amendment violation, maybe even such a violation so grotesque that the FBI doesn't think it can raise up enough crapaganda to keep a magistrate from rejecting stingray use out of hand.