The prosecution wants to make sure the process by which the evidence was obtained is not truthfully presented, because, as often as not, that process will raise questions.
If some student came up and wanted to know where to study painting, you'd want to suggest someplace, but there's no place. I wouldn't know where to send a student to study.
Every one wants to command, and no one wants to obey; and this is owing to the absence of that wonderful brahmacharya system of yore. First, learn to obey. The command will come by itself. Always first learn to be a servant, and then you will be fit to be a master.