The correct solution is encrypted, but not E2EE. This is kinda obvious imo. All official communications must be secure but backdoored. Basically there needs to be a kind of blackbox (think flight recorder) in every police department that also has the encryption keys and just records every single channel 24/7. If you dont trust the police department you can just put this blackbox in the hands of another trusted government body.
The correct solution is encrypted, but not E2EE. This is kinda obvious imo. All official communications must be secure but backdoored. Basically there needs to be a kind of blackbox (think flight recorder) in every police department that also has the encryption keys and just records every single channel 24/7. If you dont trust the police department you can just put this blackbox in the hands of another trusted government body.