 Later in 1931, Belcastro was considered a suspect in the murder of bootlegger Matt Kolb, but was never charged.Throughout the 1930s and 1940s, Belcastro continued to rise in the Outfit and ultimately became one of its top enforcers.On August 23, 1945, James Belcastro died of heart disease (although other accounts mistakenly claim his date of death on October 13, 1933).