whodunit

US /ˌhuːˈdʌn.ɪt/
UK /ˌhuːˈdʌn.ɪt/
"whodunit" picture
1.

giallo, romanzo poliziesco

a story or play about a murder in which the identity of the murderer is not revealed until the end

:
She loves reading classic whodunits by Agatha Christie.
Le piace leggere i classici gialli di Agatha Christie.
The movie was a gripping whodunit with many twists.
Il film era un avvincente giallo con molti colpi di scena.