Writing Prompt: Dilemma

Sometimes people must come to grips with a dilemma.  The thoughts and actions surrounding one make for great story fodder.  For today's writing prompt consider what a character might do if he or she learned that a friend was involved in some kind of criminal activity.  Create a fictional situation and where a character has to consider these sorts of questions:

Would they turn their friend in?

Would they still consider them a friend?

What advice would they give the friend?

How would the friend take it?