For the sake of completeness and full disclosure we must mention the Electronic Communication Privacy Act of 1934 which makes it illegal to DIVULGE (not listen to- divulge) the contents of radio transmissions except for broadcast and amateur.

So recording the transmissions and sending them to the TV news station would be illegal. The news media would have to understand this pretty clearly. They can go to the scene if they hear something on the scanner but they can't use what they hear in the story unless they can get the police to release recordings.