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
National Museum of Crime & Punishment a Firearms Training Simulator (F.A.T.S.) similar to that utilized by the FBI. The main floor was devoted to a staged crime scene investigation of a simulated murder. Visitors to the museum were guided through the process of solving the crime through forensic science techniques, including ballistics, blood analysis, finger printing and foot printing, and dental and facial reconstruction. The museum included a mock police station with a booking room, celebrity mug shots, police line-up, lie detector test, prisoners' art and jail-made weapons and escape tools, and a re-creation of the jail cell of Al Capone at the Eastern State Penitentiary