Leon Alex was imprisoned in 1942 in a forced labor camp. Two years later, he died in Ukraine. The Jewish artist, originally called Lövinger Sándor, adopted since the interwar period a position opposed to the right-wing political ideology to which he was to fall aa a victim. The artistic training path took him to Paris, where he came into contact with the left-wing avant-garde intellectual environment. Much of his expressionist graphics address social issues, adopting an anti-bourgeois discourse which, in some works, highlights how ordinary people were disadvantaged.

Among the problems of society on which the artist will dwell, a central subject is justice. In the work The Prosecutor, the protagonist is represented as a monstrous aggressive character - a fact illustrated by the distorted face.

The imbalance of power in the court and the inability of ordinary people to defend themselves against the system, which can bring very drastic accusations, are illustrated by the oversizing of the prosecutor.