Nina is The Real Villain
Everyone talking about Louis but when I analyzed the film I reach to a differents conclusions.
First, lets talk about the two characters.
Louis
1) It is clear from the beginning of the film that he is probably a psychopath and that he had other psychological problems. He probably fit to stand a trial, he aware the difference between right and wrong. but still hard to ignore the fact that this guy is not normal.
2) His character represents the yellow press, underground media, always looking for the sensational, with no sentimental value. They don't have any red line about what is proper report and what not - each photo is legit.
Nina - (1) She is unethical person, she is greedy, do everything for the money but contrary to Louis she is completely sane.
(2)She represents the mainstream media, the institutionalized media. Which should have more responsibility about true and more responsible for what should be report and what not, contrary to, for example, news sites that aren't associated with the mainstream but like we seen in the movie, in practice this is not happening.
Conclusions:
First, Let's talk about responsible, when mother leaving her child alone in the kitchen, are she supposed to be surprised that the kitchen is now dirty? The answer is no. Louis does what he supposed to do, he is a psychopath, you can't really expect him otherwise. Nina is the one that let this monster to be in place he didn't need to be.She should be the responsible adult, but she rejected this role, with full awareness of the immorality in this kind of act.
Now I come to the important part of my argument. In the past there was a clear boundary between Louis & Nina, in the past Louis belonged to the backyard of the media or even more accurately to the cellars of the media. Things like framing, corpses, blood, distorting the truth, lack of consideration for the families of the dead belonged only to small and marginal independent groups of weird people - It was some type of sub-culture.
Today, the boundary between Louis & Nina are blurred. Everything is up grab, ISIS executed people - no problem we broadcast it; filming survivors second after a disaster - no problem we broadcast it; publish the names of the dead before the family know - no problem we broadcast it. The big responsibility are on the mainstream media (Nina), they didn't need to give people like Louis so much power, he didn't belong there, but he still there.
I don't think it's accidental that Louis is as a psychopath and shown as odd bird. This metaphor aims to show that he belongs to the margins of society and the fact that he is a central part of our lives are unnatural and unmoral.
So yes, I think that Nina is the real villain here, she's the one who making the decisions, she should be the one to stop this circus and she choose not to do it.
The reality is shaped by the 'Upper class', and Nina as salient representative of the 'Upper class'. The bottom line is that people like Nina, news producers and news editors, they are the ones who make the decisions, they are the ones who decide whether to open the door to strange neighbor who lives in the basement or leave him in the place he belong - the margins of society.