Castle Bank & Trust (Bahamas)
Castle Bank & Trust was a Bahamian bank that was involved in tax evasion, as well as covertly funneling funds for the Central Intelligence Agency (CIA). The bank was founded in 1962 by Paul Helliwell, a former Office of Strategic Services and latter CIA officer, and Burton Kanter, a tax lawyer.
Source: Wikipedia — Castle Bank & Trust (Bahamas) (CC BY-SA 4.0)