The Tell Tale Heart

In the Tell Tale Heart by Edgar Allan Poe,  the narrator is tells the story.  The narrator is untrustworthy because he is insane.  His point of view affects how we interpret the story because he tends to imagine things, such as the heart beating beneath the floor.  We would interpret the story differently if it was in the police officer's point of view because they just know that there was a scream, they don't know what happened.

If the police officer told the story, we wouldn't know very much about the situation.  All we would know is that we were called to this house because the neighbor heard a scream.  We wouldn't know why the person was so anxious when we were relaxing at their house.  We wouldn't hear "the beating of his hideous heart" beneath the floor.  There would be a lot of changes in the story.  We would not understand why this man told us that he killed the old man.  There would be a lot more questions, but at least we could trust the narrator.