Frederick G. Katzmann

Frederick G. Katzmann (September 12, 1875 – October 15, 1953) was an American attorney and politician from Massachusetts who served as district attorney for Norfolk and Plymouth counties. He prosecuted Nicola Sacco and Bartolomeo Vanzetti for armed robbery and murder in a case that drew worldwide attention.

Early life Katzmann was born on September 12, 1875, in Roxbury. He graduated from Boston Latin School in 1892 and Harvard College in 1896. From 1896 to 1902 he worked as an assistant superintendent of the Hyde Park, Denham and Milton Light and Power Company.

On January 3, 1917, Katzmann was sworn in as district attorney. In 1921 he prosecuted Nicola Sacco and Bartolomeo Vanzetti for armed robbery and the murder of a security guard and paymaster during an armed robbery. Sacco and Vanzetti were found guilty and executed. Katzmann left office in 1923 and returned to private practice. However, he remained involved in later phases the Sacco and Vanzetti case by representing the government as a special assistant to the district attorney.