Marcel Furstenau in DW.com says the Federal Police (BKA) have done well to foil several terrorist plots, and the failure to arrest Anis Amri is a result of the rule of law that prevents detention without evidence. The investigation of Amri went on for 6 months and the length of the investigation shows that police were alert to the risks, says Furstenau. He points out that it would be irresponsible to say security services are not doing their job, and the focus should be on mistakes or errors on which improvements can be made for tightening security.
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