You can die of untreated syphilis. Syphilis is easily treated, so it's not necessary to let it kill you.
Frank Wallace - gangster - died in 1931.
William White - gangster - died in 1934.
Arthur Thompson - gangster - died in 1993.
William Egan - gangster - died in 1921.
William Jackson - gangster - died in 1961.
Ernesto Rossi - gangster - died in 1931.
James Burke - gangster - died on 1996-04-13.
Contracted syphilis and died
Ernest Finger has written: 'Die Syphilis und die venerischen Krankheiten' -- subject(s): Sexually transmitted diseases, Syphilis
He was killed by gangster
It is believed that he died of Tertiary Syphilis.