In La Paz, as in many other cities, it was carnival time last week. Masked dancers cavorted through the streets, children dressed up in demons' costumes and whole plazas were carpeted with confetti. In the midst of this celebration, a stocky, thick-necked German named Klaus Altmann sat glumly in a cell of the high-walled San Pedro jail. Newly arrested after nearly 30 years as a fugitive, he confronts the prospect of a French murder trial.
There is "irrefutable evidence," according to the La Paz district attorney, that Altmann is really Klaus Barbie, the SS captain who ran the Gestapo in...