On 17 May 2006, an individual named Alparslan Arslan attacked the Council of State building in Ankara. Mustafa Yucel Ozbilgin, a senior jurist, was murdered and another four were injured. FETO attempted to tie this incident again to the Ergenekon network. During the course of the investigation into the incident, it became apparent that evidence had gone missing and the investigation was being obstructed. This incident was used as a pretext by FETO to suggest that Ergenekon was an armed organization, therefore subject to terrorism laws.
FETO’s most apparent link with the Council of State attack was the relationship between public prosecutor Zekeriya Oz and a secret witness named Osman Yildirim who was given a 39 year prison sentence as a result of the Council of State attack. Yildirim, who during the Ergenekon investigation appeared as witness, defendant and secret witness, was acquitted of helping Arslan with the attack on the Council of State and of an armed attack on the office of the Cumhuriyet newspaper in 2006. He was just charged with ‘membership of an illegal organization’.