 Another suspect, Yasin Hayal, was convicted of ordering the murder and was sentenced to life imprisonment.In July 2014, the Turkish Supreme Court ruled that the investigation into the killing had been flawed, thus paving the way for trials of police officials and other public authorities.In the pursuit of this case hearings were held, and in January 2017 Ali Fuat Yılmazer, the former head of Turkey's police intelligence branch, gave testimony that the killing was "deliberately not prevented" and security authorities in Istanbul and Trabzon were responsible.