When a rogue cop is trying to keep his actions unnoticed, due to the killers that he cause.

The logline doesn't make sense. And rogue cop stories are a dime a dozen. What distinguishes this rogue cop from all the other 1,000,001 rogue cops in all the other 1,000,001 cop movies ever made?

doesn't really make sense, killers cause what? a bit short, maybe you could have added more to make it a bit clearer.

too short, extend it abit more info