In 2006 he became the head of the Mersin branch of the DTP.[1] The same year, he was charged with terrorist propaganda for having attended a funeral of militants of the Kurdistan Workers' Party (PKK) and deemed the Turkish police officers who kill children terrorists.[4] In 2006 he was arrested for two months and later released pending trial.[1] As a result of the closure case of the DTP that concluded in 2009, Bozan was banned from political office for five years.[5] Bozan eventually began to serve his prison sentence due to the terror related charge of 2006 in 2010.[4] He was released in 2012.[1]
Ali Bozan eventually appealed to the European Court of Human Rights (ECHR), which in 2020 ruled that there was a violation article 10 of the European convention of Human Rights regarding freedom of speech and Turkey was condemned to pay a penalty of 6'€500 to Bozan.[4] In October 2017 he was arrested for a few days together with other layers from the Mersin Bar Association.[6] He was investigated for terror related charges over the possession of a book about Kurds in Rojava by Fehim Tastekin.[7] In the parliamentary elections of May 2023, Ali Bozan was elected to the Grand National Assembly of Turkey representing the YSP for Mersin.[8]