Regent Law Professor James Duane gives viewers startling reasons why they should always exercise their 5th Amendment rights when questioned by government officials.
This is probably the best, most compelling YouTube video I've ever seen - watch it at least once per year. Take it to heart. Even if you are not American. Most of the principles apply everywhere: the less you say, the better!
https://www.youtube.com/watch?v=d-7o9xYp7eE