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Sweden has already received dozens of former Daesh fighters, but only one case resulted in a trial and conviction

SPUTNIKNEWS.COM
EU Lacks Intel on Daesh Returnees to Convict Them - Counter-Terrorism Expert
Some 150 former Daesh fighters and their wives, as well as 80 children, will return to Sweden from the Middle East. Only one of the country’s municipalities has refused to accept them so far, while a total of 35 are preparing to receive some 230 returnees from ISIS-controlled areas.