Swiss prosecutors announced Aug. 31 that Erwin Sperisen, former commander of Guatemala's National Civil Police, was arrested in Geneva. The arrest is based on evidence submitted in 2011 by Guatemalan authorities linking Sperisen to extrajudicial killings. Sperisen, 42, holds both Swiss and Guatemalan nationalities; because of his Swiss citizenship he cannot be extradited, but authorities say he will be put on trial in Switzerland. He is accused in at least 10 homicides carried out in Guatemala's prison during his time as police commander from 2004 to 2007, thought to be part of a campaign of "social cleansing."