Former Tunceli Governor Tuncay Sonel has been detained following allegations of evidence tampering in the six-year-old disappearance case of university student Gülistan Doku. The action follows a direct order from Interior Minister Mustafa Çiftçi, which also led to Sonel’s suspension from his current role as a chief civil service inspector.
Investigation into Evidence Tampering
The Tunceli Chief Public Prosecutor’s Office prepared an official document stating there is sufficient suspicion that Sonel engaged in the destruction and concealment of evidence. This legal move marks a significant escalation in the investigation into the disappearance of the student.
Authorities are currently investigating multiple serious crimes, including murder, the deletion of digital traces, and the misuse of public influence. The investigation aims to determine if official power was used to obstruct the truth.
Family Allegations and Latest Evidence
The family of Gülistan Doku has raised grave concerns, alleging that Tuncay Sonel took the student’s SIM card from them while he was serving as governor. They have also filed a criminal complaint claiming Sonel was aware of the main suspect’s escape abroad.
In a related development, Sonel’s son, Mustafa Türkay Sonel, was detained in Istanbul on April 14. The Ministry of Justice released a note stating that records and photographs suggest the son was in Tunceli in 2020, driving a luxury vehicle.
Defense and Case Background
Tuncay Sonel has dismissed the allegations as “slander,” stating that neither he nor his son knows Gülistan Doku. His lawyer has declined to answer specific questions regarding the SIM card, citing the confidentiality of the ongoing investigation.
Gülistan Doku, a second-year Child Development student at Munzur University, vanished on January 5, 2020, after leaving her dormitory. While search efforts in the dam lake ended in October 2022, her family has continued to push for the arrest of other suspects, including a former police officer.
Potential Future Developments
The investigation may expand as authorities analyze new documents and information. Further detentions could occur if the link between the luxury vehicle sightings and the case is strengthened.

Legal proceedings could lead to a formal trial regarding the alleged misuse of public office. This process may potentially provide the family with answers regarding the student’s whereabouts.
Frequently Asked Questions
Why was Tuncay Sonel detained?
He was detained based on suspicions of “destroying and hiding evidence” related to the Gülistan Doku investigation, following instructions from Interior Minister Mustafa Çiftçi.
Who is Mustafa Türkay Sonel?
He is the son of Tuncay Sonel. He was detained in Istanbul on April 14, and the Ministry of Justice noted he was seen in Tunceli in a luxury car during the period the student disappeared.
What happened to Gülistan Doku?
She disappeared on January 5, 2020, after leaving her dormitory at Munzur University. Despite extensive searches, including efforts at the Uzunçayır Dam Lake, she remains missing.
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