What accusation did Vanzetti make against the prosecuting attorney, Mr. Katzmann?

Vanzetti accused Mr. Katzmann of supporting the juror's prejudice and passion against him and Sacco. This reveals that Vanzetti believes that Mr. Katzmann "agitated" the "passion" of the judge's prejudice of his political views and principles, which affected the decision making of the trial.

Explanation:

from the conditions of the working class in england by friedrich engels,the main idea is :

a, both were musicians during the jazz age