What if Gauti is also out for revenge? Revenge for Neha's death i mean...I will substantiate this with the following reasons...š
We all know that he was in love with Neha and for some reason wasnt able to confess his feelings
As you can see his relationship with Gauri was more of the love-hate type initially but after Roshini came into his life and Gauri started bossing over Roshini telling her to do this and that, the relationship with his sister that was already in tenterhooks took a turn for the worst...Am not saying that he hates his sis now but he takes Roshini's side more and defends her more even in front of Gauri...
And after Roshini's entry he started hanging out with her a lot, became her confidant and best friend...
He constantly warned Roshini about the Paanch and told her not to get involved with them whatsoever..even after knowing that she had become a part of the gang, he kept warning her and told her to refuse their tasks because i think he had aimed at taking revenge from them from the start and that he doesnt want the love of his life to get involved in all this and get hurt in the process...like how Neha suffered...
For all i know he might even be the one behind the switching of the memory card...