That'd be weird STL city cops got a memo on it, seeing as it's illegal there.
Also, face to face convo is a great tool. I'm glad you got to talk and show you are just a normal guy. Cops don't need to fear any recording, as long as they are trying to operate within the law. And if that's what they're doing then we have something in common.
I'd like a look at the memo, though. Can we get that through the Sunshine Law?