Where did this "and beat you" part come from? I often hear this in this context, but I've never heard of any case in the U.S. where this has actually happened.

Where did this "and beat you" part come from? I often hear this in this context, but I've never heard of any case in the U.S. where this has actually happened. (I'm working on a guide to help people protect their data from searches at the U.S. border, and have worked on court cases related to government attempts to force people to help access encrypted data.)