He was arrested on the 2 February 1980 during a protest against the murder of Sinan Suner, who had been killed by a member of the security detail of Cengiz Gökçek [tr] from the Nationalist Movement Party (MHP).[1] During the protest, Eren fled a confrontation with the police, but was later caught. The officer who caught him, Zekeriya Önge [tr], was shot a few moments later[4] and Eren was prosecuted and sentenced to death for the murder on the 19 March.[5] During trial Eren denied having killed Önge[3] and witnesses testified that the police officer was shot from behind and from some distance by a third party.[4] He was visited in prison by the journalist Savaş Ay and interviewed shortly before he was executed.[5] Eren was hanged on the 13 December 1980 in Ulucanlar prison[6] and buried in Karşıyaka cemetery.[7] The coup leader, Kenan Evren, claimed that Eren was a terrorist and had murdered Önge by shooting him from behind.[8][9][10]