What if "The Cask of Amontillado" were told as a police report or newspaper story. Would the story be as horrible or as shocking?
I believe that the story would definitely be as shocking presented as a news story. The basic premise of the story, which is murder based on revenge, would not change, even it were presented in another way.
News stories tend to present facts in a way that is sensationalized. The fact that the narrator of the story murders his "friend" based on what he believes to be past insults is horrific in any light. That he was able to carry out such an elaborate plan resulting in the tortuous death and apparent preceding madness of the victim is, indeed, shocking. I do not believe that changing the medium in which the story is presented would do much to alter its shock value.