Poll Suggestion - Favorite Whodunit Film: Who Kept You Guessing?

The "whodunit" mystery pits the audience against the detective. You get the clues, meet the suspects, and try to unravel the puzzle: Who committed the crime? It all leads to that crucial final reveal. Which of these films, focused on solving the central crime puzzle, is your favorite? List - https://www.imdb.com/list/ls596675017/