1.That eye witness telling number of car in front of mihir and mihir going to check the car in society and denying its presence.
2.Raman said only two people can hv access to his documents - simi(who could forge them) or mihir.
3. When romi was being followed by the accident car, only Mihir could hv known that he was leaving office coz that day only raman and mihir were in office.
4.It was mihir who tried to divert raman to that paralytic man buying the car since raman had asked mihir to do the investigation of the man who bought the car. While raman insisted its obvious the man is lying mihir tried to push him to believe it.
5.Even today raman told the truth abt the car in ashok's garage to ONLY mihir. Shagun could not hv planned such a great drama before knowing in advance that raman has seen the car. Also Adi not going with Ishu is again a clue. The way he ran out seemed something was not normal. May be Shagun sent a car for him because she knew a huge drama is to be staged at home.
6.Also the day Raman came to arrest param, Shagun was so cool.That day what all she had in her mind was raman forgetting abt adi's stem cell. How come if she was the culprit she didnt panic at that moment.
I feel really sorry and sad to believe its Mihir. Tried to dodge my gut feel many times but the disturbing presence of mihir in this whole accident is really bothering. I hope I am proved wrong.