Roger Keller, a former banker at Wegelin & Co, is charged by US prosecutors with helping wealthy Americans evade taxes. He has been arrested in Germany pending extradition to the US. R. Keller was indicted 3 years ago together with two other Wegelin bankers, Michael Berlinka and Urs Frei, and is among 38 offshore bankers, lawyers and advisers charged in the US since 2008 with tax crimes says Jack Townsend on hi blog. All three were from Switzerland, which does not extradite its own citizens.