You will not live very long as a Christian, until you will see with your own eyes, or hear with your own ears the fall of a person who is known to be a Christian. It can be very impacting, cause great concern and raise many questions:

Who is affected? (More people than you think)How should you respond? Is there a way back for the offender?Finally, is there a way to tell if the offender is on the right track? (Signs of genuine repentance)