I think the hooded murderer is Rohan, because only once Taashi didnt tell Rohan the address of Lakhiya Chacha and she suceeded and everything else she discussed with Rohan, didnt go well. So I think he turned negative.
If it isRohan, then when they both were trying to go to Manali in the night, whom did Maaji call since Rohan was with Tashi then? And when Rohan was talking to the shop keeper the jeep or lorry comes very fast to hit Tashi and Arjun saves her. Maybe they arranged it so .
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