Onur Gencer, who stormed an office of the opposition Peoples' Democratic Party (HDP) in the western province of İzmir and shot Deniz Poyraz dead on June 17, was arrested on June 18.
In his statement to the police, Gencer said that he did not have any connections with any group and that he carried out the attack because of his hatred toward the PKK.
The Turkish security forces have neutralized a total of 18,140 terrorists since July 24, 2015, Defense Minister Hulusi Akar has said.
"As of July 24, 2015, every place that terrorists said 'inaccessible' was entered," he said while addressing military personnel at a dinner in the southwestern province of Muğla on June 6.
The Mitsotakis government on Friday evening tabled a landmark draft bill envisioning reforms in much of the country's labor sector, changes that the pro-business and pro-market government underlined as long overdue, but which are expected to generate heightened criticism by the political opposition and Greece's still formidable unions.