whodunnit

/huˈdʌnɪt/
noun
  1. Alternative spelling of whodunit — a story, movie, or play about a crime, usually a murder, where the identity of the person who committed it is not revealed until the end.
    • This whodunnit kept me guessing until the very last page.
    • She prefers whodunnits over romance novels.
    • The play is a classic whodunnit with a clever ending.
Synonyms
What does "whodunnit" mean? | whatsthatwordmean | whatsthatwordmean