Giovanni Montinaro, son of Judge Giovanni Falcone's chief of security, strongly opposed the film, criticizing the choice of releasing it on the anniversary of the murder of his father and of the others involved in the attack. He let it go when Pierfrancesco Favino told him that the date was chosen by the production precisely as a way to pay homage to Falcone, his wife and his security detail, killed that day in 1992.
Luigi Lo Cascio, who plays Mafia boss Salvatore Contorno, debuted in cinema playing the role of Peppino Impastato, a notorious activist who fought Mafia, in the movie "The Hundred Steps"
According to release dates category, The Traitor which would normally would be out by Christmas along side with 1917, but because Italy theatrical release was 2019. In the U.S they did not release this film not in theaters but in VOD, and Digital Video Disc until May of 2020 due to the covid-19 pandemic.