Gone Girl: who is the real killer?

Based on the thrilling novel by Gillian Flynn, Gone Girl hit theaters on October 3, 2014. With a plot more twisted than the mind of the psychotic antagonist, viewers were constantly guessing who was at fault for the murder of an American sweetheart.
Nick Dunne(Ben Affleck), became the suspect of a murder investigation after reporting the disappearance of his wife Amy Dunne( Rosamund Pike). Nick appeared to be the charming, loving husband up until the media frenzy turned him into a possible killer.
Dark, mysterious, and full of revelation, viewers were constantly torn between which characters were worth rooting for or considered trustworthy. Director David Fincher made a cinematic masterpiece that had hearts racing just to calm the tension with quick one liners as comedic relief.
Amidst all the chaos of Nick going from victim to potential suspect, the voice of reason was voiced by Margo, his twin sister played by Carrie Coon. She helped the audience see parts of Nick that wouldn’t have been seen without her. Nick reveals all of his secrets to her that help add dimension and twists to the plot, all while adding a bit of unrelenting humor to the somber plot.
The couple was easily likeable: they were presented as a beautiful, wealthy, and intelligent. The early stages of the relationship made them seem infatuated with each other, but on the morning of Amy’s disappearance, viewers start to see the effects that the marriage has had on the two. No longer was it a relationship of love, but one of putting up with the other. However, there was nothing so traumatic and annoying that would lead the viewer to understand why Nick and Amy would do the things they did.
Full of unexpected twists and turns, Fincher created a masterpiece that had viewers waiting for the next plot twist only to have them occur at the most unexpected moments. He created characters that made the viewer root for them one moment then loathe them the next. He revealed that there’s not always an evident bad guy, sometimes the victim can play a trick or two of his own.