Remember this: "You shall not bear false witness against your neighbor." That's the ninth of the Ten Commandments.

If people do this, the truth will prevail.

I guess I should also add to this but not that the Ninth Commandment needs anything.

Disclose everything pertinent about the situation.

Joe Hunting Club Member - "I got kicked out of my hunting club and the president is an @$$^&$#!!" And, if applicable, "... for trying to sneak a small buck out of club property without anyone knowing."