Canan Kaftancıoğlu, the head of the İstanbul branch of the country’s main opposition Republican People’s Party (CHP), was placed in İstanbul’s notorious Silivri Prison on May 31st to serve a five-year sentence on a terrorism conviction.

The charges related mostly to tweets Kaftancıoğlu posted between 2012 and 2017. She is charged with spreading propaganda for a terrorist organization.

Kaftancıoğlu, a doctor by profession, played a key role in the shock victory of the CHP’s İstanbul mayor Ekrem İmamoğlu in 2019 — the first time Erdoğan’s party had lost power in Turkey’s biggest city for 25 years.

She was accompanied by a group of Republican People’s Party (CHP) members as she arrived at the İstanbul Courthouse on Tuesday from where she was taken to Silivri Prison on the outskirts of İstanbul where most political prisoners are jailed.