"Baltimore Goes Dark: Police Scanner Encryption Creates New Danger" 

https://nationalinterest.org/feature/baltimore-goes-dark-police-scanner-encryption-creates-new-danger-193751

Jim Bell's comment:

One possible compromise would be to delay the 'plain-audio' by a short time, 5-10 minutes, possibly using encryption.  Depending on the circumstances, the delay could be shortened, eliminated, or lengthened.