One Galleanist in particular, Italian anarchist Mario Buda (1884–1963), an associate of Sacco and Vanzetti and the owner of a car which led to the arrest of the latter for a separate robbery and murder, is alleged by some historians, including Paul Avrich, to be the man most likely to have planted the bomb. Avrich and other historians theorize that Buda acted in revenge for the arrest and indictment of Sacco and Vanzetti. Buda's involvement as the Wall Street bombmaker was confirmed by statements made by his nephew Frank Maffi and fellow anarchist Charles Poggi, who interviewed Buda in Savignano, Italy, in 1955. Buda (at that time known by the alias of Mike Boda) had eluded authorities at the time of the Sacco and Vanzetti arrests, was experienced in the use of dynamite and other explosives, was known to use sash weights as shrapnel in his time bombs, and is believed to have constructed several of the largest package bombs for the Galleanists. These included the Milwaukee Police Department bombing, which was a large black powder bomb that killed nine policemen in Milwaukee, Wisconsin, the time of the bombing, but he was neither arrested nor questioned by police.