ATHENS, GREECE - DECEMBER 06: Greek riot police take security measures during the protests marking the 10th death anniversary of teenager Alexis Grigoropoulos, at the Syntagma Square in Athens, Greece on December 06, 2018. On Dec. 6, 2008, 15-year-old Alexis Grigoropoulos was shot dead by a police officer, after officers approached a group of boys in Athens??? Exarcheia district and allegedly provoked them. Ayhan Mehmet / Anadolu Agency/ABACAPRESS.COM