A couple years ago I was playing around with an RTL-SDR and I had it scanning a wide range for any voices. I found a police frequency and they were having a standoff in the park. A mother had a knife and her child with her, I assume it was some sort of hostage situation. They apprehended her, and when they transmitted her ID info, they scrambled the transmission. So I was able to learn about the situation but not who specifically was involved, and I agree with this approach honestly. It never made the news btw.

I’m not sure how it works exactly but I assume they have two transmit buttons on their handsets, regular voice and encrypted voice.