Muhammet Uslu, a putschist who worked as the private secretariat at the prime ministry, confessed over the weekend in his testimony that he provided the equipment to wiretap the chief of staff.
In his testimony, Uslu confessed that he planted recording devices on the phones of Levent Türkkan, the aide-de camp of the chief of staff, and Gökhan Seki, an employee at the presidency of generall staff, to eavesdrop on the chief of staff's room.
Uslu said that he would take the recording devices back when they were full.
Uslu, codenamed 'Murat', also confessed that he was in touch with 22 Gülenist Terrorist Organization (FETÖ) members, most of which were soldiers in the military.
Uslu said that he was a teacher by profession, but was recommended to the prime ministry's private secretariat by Gülenist deputy secretaries Ercan Demirci and Ahmet Emre Bilgili.
On July 15, a group of rogue soldiers linked to the FETÖ terror organization attempted to topple the democratically elected government in Turkey and bring martial law in effect.
The attempt was prevented by the military loyal to the government along with police units and millions of people in favor of democracy.
Over 230 civilians were killed and at least 1,500 people were injured. Opposition parties have united in condemnation of the coup attempt, denouncing it in the harshest terms and underscoring their determination to preserve democracy and rule of law in Turkey.