Blunders that let Berlin Christmas terror suspect go free: He was under surveillance for months, arrested and freed three times, and not deported because of a clerical error

http://www.dailymail.co.uk/news/article-4054140/How-German-police-bungled-hunt-Europe-s-wanted-man-Asylum-seeker-23-wrongly-blamed-Christmas-market-massacre-jumping-red-light.html