Al Capone charities and was viewed by many as "modern-day Robin Hood". However, the Saint Valentine's Day Massacre, in which seven gang rivals were murdered in broad daylight, damaged Chicago's and Capone's image, leading influential citizens to demand government action and newspapers to dub Capone "Public Enemy No. 1". The federal authorities became intent on jailing Capone and prosecuted him in 1931 for tax evasion. During a highly publicized case, the judge admitted as evidence Capone's admissions of his income and unpaid taxes during prior (and ultimately abortive) negotiations to pay the government taxes he owed. He was convicted and sentenced to
Al Capone becoming a protector for Capone. The conspicuous protection of Rudensky and other prisoners drew accusations from less friendly inmates, and fueled suspicion that Capone was receiving special treatment. No solid evidence ever emerged, but it formed part of the rationale for moving Capone to the recently opened Alcatraz Federal Penitentiary off the coast of San Francisco. On June 23, 1936, Capone was stabbed and superficially wounded by James C. Lucas. At Alcatraz, Capone's decline became increasingly evident as neurosyphilis progressively eroded his mental faculties. He spent the last year of his sentence in the prison hospital, confused and disoriented. Capone