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Threatening letters were sent to Seda Basay-Yildiz, a lawyer in Germany representing an Islamic extremist in court, revealing personal details of her daughter's location. The letters explicitly said they would slay her daughter. The letters were linked back to computers used by members of the Frankfurt Police. Full story below.
https://www.dw.com/en/german-state-probes-frankfurt-police-extremist-network-report/a-46765959