"It's here in Paris where my sister and her friends were killed," said Metin Cansiz, the brother of Kurdish activist Sakine Cansiz, who was gunned down in January 2013."France has a debt of justice towards us."His eyes are red and his hands tremble as he looks back on the fate of his sister, killed in the French capital on the night of January 9, 2013.Cansiz, a white-haired 61-year-old, was speaking to AFP days before the 10th anniversary of the still-unsolved slayings. His family, he said, had lost a loved one "sacrificed" on the altar of Franco-Turkish relations.