How to Kill a Judge (Italian: Perché si uccide un magistrato), also known as The Murder of a Magistrate and Why Does One Kill a Magistrate?, is a 1974 Italian crime-thriller film directed by Damiano Damiani.

It is the final chapter in the Damiani's trilogy about mafia, after The Day of the Owl and Confessions of a Police Captain.

[2] Giacomo Solaris is a film-maker whose latest released feature film is a crime thriller about a judge who gets too friendly with the Mafia and is murdered.

A resentful Sicilian magistrate orders the film seized, but then the judge winds up dead, in a fashion just like that in Solaris's movie.

Solaris realizes that corrupt political forces are pulling strings and attempting to cover up murders of his friends who begin to die in grisly ways.