I am keeping what I know to myself. The big bomb will be when OM chain of command confronts him. She will know for sure that I know then. I just need to keep a level head, and keep the upper hand through all of this.
Unless you told your COC about the evidence you have, don't be so sure about that. Don't be surprised when OM denies anything is up and tries to make you look crazy. Strength and honor man - you know what you know and you are all business when it comes to that.