Kirumi (2015)

Kathir, a carefree young man, becomes a police informer like his neighbour Prabhakar, and begins to get too close with inspector Soundarapandian, despite the warnings of the latter. It is only when he tries to ride on an ego clash between Soundarapandian and Mathiarasu, a rival inspector, that he realizes he's become a pawn in a dangerous game.

Source: TMDb