if someone you knew was hurt bad (I.E. Molested/Raped, Beaten/Killed, Ruined/Fraud) what would you do?

and try and consider this for the different people
1. an Enemy
2. a Child
3. a Female friend
4. a family member

would you
a) kill the person who did it
b) Talk to them and let them know how you feel either the perpetraitor or the victim
c) Turn the perpetraitor into authoritys
d) Depends and explain
e)Nothing at all