I don't trust anything he says to Yuvika except his "Main humesha tumhare Saath hnu" & if he ever says "I love you" 
With Vidur he mentioned working WITH Aroras not working FOR Aroras. He can assist Arora against Mahajans even if he is a COP. With Vidur he did mentioned his office but not precisely what kind of office
Most importantly I would've DOUBTED my theory agar woh Kal police ko Bhaga deta
Woh police leke Aaya, jeep mein bethke so obviously he didn't predicted murder by Vidur as all of you claimed, he clearly warned police to treat him like civilian.
Plus it's a very common thing ki ek murdered body dekhke MY reaction & My non law background friend ka reaction will be different
Neil's reaction was how I am gonna react, Yuvika's reaction was how a normal person gonna react
Khud hi sooch na

Plus his behaviour, body language, dressing screams that he is some high level officer.

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