You don't have to explain yourself to them. They don't know the legalities involved, they are grunts. Just tell them simply that you will only answer the questi

You don't have to explain yourself to them. They don't know the legalities involved, they are grunts. Just tell them simply that you will only answer the question a single time, and the answer is no, and you will ignore future questions about the matter. And ask for your lawyer. If you aren't going to allow access into your personal devices to begin with, you're probably getting that interview regardless.