The Tahsiye group are a small religious community opposed to the views of FETO leader Fethullah Gulen. In a recorded sermon, Fethullah Gulen, issued a signal for an operation against the Tahsiyeci group by implying that they were an armed radical group. Following Gulen’s sermon, the FETO-aligned Zaman newspaper began to publish stories in support of this narrative. Similarly, a FETO-aligned TV channel wrote the Tahsiyeci group into the script of a TV serial as a terrorist organization.
In January 2010, the police launched an operation on the pretense of investigating the activities of al-Qaeda. During the operation three grenades were found in properties belonging to Tahsiye members, yet the court noted that there was no evidence to connect those arrested with the find which led many to suspect the evidence was planted. The raids were conducted under police chief Tufan Erguder, who was also involved with the Ergenekon and Balyoz cases. Others involved in the case include police chief Mutlu Ekizoglu, who was also a figure in the Ergenekon and Balyoz cases. Ekizoglu was expelled from his profession in 2014 for gross misconduct.