I don't know the law in the US, but here in Sweden any police investgiation is kept under strict secrecy until completed. When a crime occur and journalist ask for details the answer is always the same. While investigation is ongoing no details may be given. That would not work if there is a searchable transcription of the communication online.
So an nice technical achievement, but the more successful it is the faster it will be made obsolete in terms of getting information out of police scanners.