I should tell you, though, that this is one of the reasons, although perhaps not “the” reason, we've gone away from the interpreter interpreting from mouth to ear, the way it used to be. Clearly nobody heard that. Nobody was recording that. So nobody knew if the quality of the interpretation was any good.
Now the interpreter has to interpret out loud and it has to be recorded, so at least the accused can come back and say, “Read this. I couldn't understand a word they were saying.”