If he is charged as a minor, then the statute of limitations has run for prosecution.  However, if the state could garner a good reason for charging him as an adult, then there is a potention for prosecution depending on the nature and extent of the touching.  This does not happen often, but it is a slight, potential consequence. The decision to explore these options really depends on your friend.  If she is content that she has moved on and does not want to relive the events via a criminal prosecution, then she may simply want to explore other options through counseling.