Your 'protection' link is broken.
Worth considering that recording people w/o their knowledge is explicitly illegal in several states. Generally they refer to these states as having a "dual consent" law. People most often associate this with recording telephone conversations but depending on state law it can mean anything.
One piece of advice i find myself giving people about workplace conflict: Remain professional, rational, and conciliatory at all times. Keep emotion out of it. If you can keep your cool while making it clear to management that you are eager to resolve the situation and do what's best for the company, the other guy is the a**hole. If you flip out and make an emotional scene, you are the a**hole.
Also, I've heard that "the mask of sanity" is a good book on the subject, but i have not read it.