L'arma, l'ora, il movente, internationally released as The Weapon, the Hour, the Motive, is a 1972 Italian giallo film produced, co-written and directed by Francesco Mazzei.

[1] It is the first giallo that showed a corrupt priest as victim of a crime, a plot that would become a topos of the genre.

[2] Co-plotter Marcello Aliprandi went on to create another similar film in 1982, involving murder and Catholicism, entitled The Vatican Conspiracy.

[1] Don Giorgio (Maurizio Bonuglia), a handsome priest who teaches in a convent, has been having affairs with two different women.

The police learn that a little boy (Arturo Trina) witnessed one of the killings, but they're not sure if he is reliable.