Mani's murderer

Who do you think is the murderer? I have a doubt on Taneja from the beginning . Nikhil is also somehow in doubt after that conversation with Ruhi , dont know why but looks maybe somepast connection is there with Raman with Nikhil . But my doubt is on Taneja , but now more on Nikhil , dont know who is this newgirl Anami related to .

from the pic which they showed it looked like Nikhil to me