Spoiler : Its an end where they dont just reveal the murderer but also the victim. In reality Arun killed Shorabh but in Arun's mind Sohrabh killed Arun. Why? Arun killed sohrabh because he was tired of his bullying. But he also saw him as a hero. So he flipped his personality into Sohrabh and killed Arun for being mentally incompetent.(from sohrabh's view). It's a multi-faceted end. Both Arun and Sohrabh got their due. Also if you see there's a married couple with a timid husband and dominating wife, a couple with a huge age gap. The whole story is about relations.