You can say as much as you like that Sentsov, is not a terrorist, but no one who says that this man is a political prisoner brought any argument – an argument that could be sewn to the case, that he was not to blame. Not a single argument.
Oleg Sentsov is a Ukrainian filmmaker and writer, native of Crimea, best known for his 2011 film Gamer. Following the Russian annexation of Crimea he was arrested in Crimea and convicted to 20 years in jail by Russian court on charges of plotting terrorism acts. The conviction was widely described as unfair and politically-motivated. On 14 May 2018, Mr Sentsov went on an open-ended hunger strike protesting the incarceration of 65 Ukrainian political prisoners in Russia and demanding their release. Three years ago, the Russian Human Rights Center Memorial declared Oleg Sentsov a political prisoner [see in Russian: https://memohrc.org/ru/news/memorial-schitaet-olega-sencova-i-aleksandra-kolchenko-politzaklyuchennymi ] [see in English: https://www.csce.gov/international-impact/events/oleg-sentsov-and-russias-human-rights-violations-against-ukrainian?sort_by=field_date_value&page=10 ; http://khpg.org/en/index.php?id=1527519105&w=ukrainian+political+prisoners ].
Amnesty International has called for Sentsov's immediate release and writes: "He was convicted in a military court in the Russian Federation, following a grossly unfair trial, on politically-motivated charges and his conviction was based on “confessions” obtained under torture." www.amnesty.org/download/Documents/EUR4685282018ENGLISH.pdf,
European parliament adopted a resolution in June 2018 that demanded that the Russian authorities release "Ukrainian political prisoner Oleg Sentsov". www.europarl.europa.eu/oeil/popups/ficheprocedure.do?lang=en&reference=2018/2754(RSP),