Finding the money
The ability to hide assets seems to transcend all evil in the world.
Bin Laden's money is probably in numbered Swiss accounts. Not even the evil of holocaust was sufficient to expose Nazi money stashed away.
The Swiss banks have been sued by holocaust survivors for "losing" their money and large settlements have been won but to the best of my knowledge the numbered account system remains inviolate.
Never say never but the Swiss are as inscrutable as the Asians when it comes to money.