Silence the Witness

De Luca is killed by Marchettis chauffeur Marchetti ordered the murder because he was to be accused by De Luca The two have a car accident while going home to get an alibi There is a witness Sironi who calls the police But when the police arrive the car has gone and so have the two men Inspector Santi and young judge Novelli look into the strange case Marchetti however is a powerful man and Sironi and his family begin to be obsessed first by threats then by assaults