The Annual reports of the Swiss Money Laundering Reporting Office (MROS) are slightly more entertainig than you might imagine. In particular, they have a section full of vignettes from the past year’s prosecutions.
the foreign client had indicated that incoming funds transferred
to the account would come from the sale of protective vests. However, it turned out that the payments related to the sale of tanks and high-calibre weapons
….
Particularly suspicious were undated contracts signed with the Ministry of Defence of an African country as well as other documents. The bank could not exclude the possibility that these contracts had been falsified and, given the close ties that the client maintained with African government officials, that the client was also involved in corruption
….
[MROS] concluded that the beneficial owner of the account was involved in extensive deliveries of weapons to Africa
They have plenty more — the 2012 report includes everything from “Brothel in the Caribbean”, to “Graft and cronyism in the South American energy sector”