On 22 July 1980 the founder of DİSK and chairman of Türkiye Maden-İş, Kemal Türkler was killed in front of his house in Merter, Istanbul. The public prosecutor in Bakırköy indicted the alleged right-wing militants Ünal Osmanağaoğlu, Aydın Eryılmaz, Abdülsamet Karakuş and İsmet Koçak for being involved in the murder. Bakırköy Heavy Penal Court 2 twice decided on acquittal of Osmanağaoğlu. Each time the Court of Cassation quashed the verdict. On 1 December 2010 Bakırköy Heavy Penal Court 2 ruled that the case had to be dropped because of lapse of time.