Most are based on existing novels of the mystery genre – the films are influenced alot from that existing genre.

Sherlock Holmes (1916): First film of the genre, it was based off of the novel so the genre was already set based off of the literary genre.

Citizen Kane (1941): Solidifies the mystery genre, including interviews, collection of past events and the final reveal.

Clue (1986)

Knives Out (2019):