It's not a new problem. There was an HN article I was reading about someone facing police audio tape evidence and their defence lawyer said it must have been ed

It's not a new problem. There was an HN article I was reading about someone facing police audio tape evidence and their defence lawyer said it must have been edited to make their client look guilty. The prosecution proved the recording was continuous and not edited from the pattern of mains hum noise on the tape. There'll probably be some clever technical methods to differentiate deep fakes from original recording along soon. Then there's just simply the weight of other evidence that may be present e.g. whether witnesses agree they said the statement etc.