You seem to bow be showing some fear of looking like an idiot yourself.....Let me help you out.

SCENARIO ONE: Someone else reports this or she screws up and the truth comes out. Either is likely. Your boss comes to you and asks if you knew about this. You have no good answer do you? If you say yes you knew and did nothing, of I were your boss, you'd go next! If you say you didn't know, then I as your boss figure you're incompetent as well as the other group, and I begin to formulate a plan for shuffling your ass out the door!

SCENARIO TWO: You report this and admit your own mistake. I (the boss) figure that you should have done a better job, but I want you on the payroll because you have just shown yourself honest and not afraid to admit your mistakes when you find them. I'll take 25 of you to the above two people anytime. Matter of fact, that level of honesty and admitting guilt is something a lot of managers look for.

Your choice........

Spaw