Upon meeting Officer Tommy Hansen, the audience think he is a young, respectful, straight-laced individual who is eager to help society and do no wrong. By the end of the film, we find out that he is an individual who has no problem throwing around racial slurs, and even winds up shooting an unsuspecting person at point-blank range in the passenger seat of his car. Even after these events have occurred, some viewers will not change their opinion of Tommy.
-Which concept helps explain this?
Fundamental Attribution Error