As seen in places around our country like Ferguson, Missouri, the police sometimes do not act for the benefit of the people. The police represent the idea of the "Good Samaritan" type who watches out for others and protects the interests of the public. However, in The Departed a police officer, played by Matt Damon, is an informant for the infamous mob boss Frank Costello. Instead of using his position to protect the public he pursues his own self interest. Since he is actually protecting an enemy of the public he is using his position to gain things for himself. The movie demonstrates that even though he is a police officer, that doesn't exempt him from working for his own self interest, which breaks the stereotype that those there to protect us will actually do so.
The Departed is a movie that challenges stereotypes that are rooted in our society. It reflects that because something seems to be a certain way does not make it so. These stereotypes are important to discuss because they implicate events in our country like Ferguson, Missouri. The Departed demonstrates that in life, people are not necessarily what they appear to be.