I am looking for a movie which depicts a murder in eight different perspectives. I think it's a whodunit plot movie I saw the ad once on TV where they show something like a influential person like president is about to conspired and killed and they show 8 other characters trying to depict that information as to reveal the identity of the killer.
You might want to check this movie which I bumped into on my netflix account. It's called Murder by Death. It's a movie where they have all fictional detective characters like Poirot and Miss Marple and 3 others whom I forgot compete to solve a crime. The guy in Columbo plays the principal role in that movie.
Edit: I think this is the movie you're looking for: Vantage Point.