"When I was in college, someone in my class stole a copy of a final exam before it was given and distributed copies to others in the class. The instructor found out said that, unless the person who stole the test came forward, the whole class would be given an 'F' for their grades. I had been approached by someone with a copy of the test and I privately told the instructor that I knew who had taken the exam. The instructor was kind enough to keep our conversation private and made a new test to be administered. I didn't want to be involved in the frustration of the situation, but I also didn't want innocent students to receive failing grades because of someone else's bad decision."