After an unsuccessful appeal to the country's Supreme Court, he was executed in Ramla prison on 31 May 1962.
Prior to his role in the Eichmann trial, Bach emigrated from Germany to Jerusalem in 1938, studying at the Hebrew University of Jerusalem and University college London, where he graduated in 1949.
He began working as a public prosecutor in 1953, before being appointed Deputy Attorney General of the State of Israel. Bach was later appointed to Israel's Supreme Court in 1982 before retiring in 1997.