Weingarten Rights: Representation During Investigatory Interviews

If you were called into an investigatory interview right now, would you know exactly what your rights are? Are you even sure what is and isn't an investigatory interview? Stewards, if you had to represent someone right now, would you know what you could and couldn't do to help the employee?

Brush up here: Weingarten Rights for CSUEU

Have you found or created a good writeup of Weingarten rights? Tell us in the comments!