Slytherin boys

Its currently your 7th year at hogwarts. You are a Ravenclaw which is why you got to be close friends with Pandora. Together with Regulus the three of you are best friends. Due to that friendship you also got to know Barty Crouch jr., Evan Rosier and Severus Snape. You do not know them that well, nor do you know that they are death eaters. So when you go to their room one day, worried because they havent been to any classes that day, you are shocked to find them looking rather injured, deep wounds covering their bodies. They are just back from a death eater meeting. What will you do?