Detention: On May 3, 2023, Russian FSB officers detained him and charged him with treason (Article 275 of the Russian Criminal Code), illegal production of explosives (Article 223.1 of the Russian Criminal Code), and illegal storage of explosive devices (Article 222.1 of the Russian Criminal Code). According to the Russian investigation, Kostyantyn Evmenenko allegedly collaborated with the Security Service of Ukraine and, together with another accused, Oleksandr Lytvynenko, planned an attack on representatives of the occupation administration of Crimea. Ukrainian human rights organizations emphasize that the case shows signs of politically motivated persecution, and verifying the evidence is impossible due to the closed nature of the proceedings.

Sentence: In July 2023, the Russian-controlled 'Supreme Court of the Republic of Crimea' found Kostyantyn Evmenenko guilty and sentenced him to 10 years in a strict regime colony, 1 year of restricted freedom after release, and a fine of 500,000 Russian rubles. In the same case, Oleksandr Lytvynenko was sentenced to 9 years and 6 months of imprisonment. Human rights defenders view this case as one of a series of politically motivated criminal prosecutions of Ukrainian citizens in occupied Crimea.

Kostyantyn Evmenenko is a Ukrainian citizen and a civilian resident of temporarily occupied Crimea. Little biographical information about Kostyantyn Evmenenko is available in open sources. It is known that he is a civilian and was not part of any military formations. Due to the closed nature of the investigation and trial, most case materials remain inaccessible to independent journalists and human rights defenders.

During the trial, hearings were mostly held behind closed doors. Therefore, international and Ukrainian human rights organizations emphasize that it is impossible to independently assess the evidence on which the conviction is based, casting doubt on the fairness of the trial.

After the sentence was issued, Kostyantyn Evmenenko was transferred to a facility of the Federal Penitentiary Service of the Russian Federation. The lack of public access to case materials and the closed nature of the trial complicate obtaining reliable information about his detention conditions and health status. Human rights organizations stress that the practice of holding such cases behind closed doors does not meet international standards of fair trial and deprives the defense of the opportunity for effective public oversight.

The case of Kostyantyn Evmenenko is documented by the Crimean Tatar Resource Center, the Representation of the President of Ukraine in the Autonomous Republic of Crimea, the ZMINA Human Rights Center, the Crimean Human Rights Group, CrimeaSOS, and other Ukrainian human rights organizations monitoring politically motivated persecutions in the temporarily occupied territory of Crimea. They view such criminal cases as part of a systematic practice of persecuting Ukrainian citizens on charges of 'treason,' 'sabotage,' or 'terrorism.'

As of July 10, 2026, Kostyantyn Evmenenko continues to serve the sentence unlawfully imposed by the Russian occupation court. Ukrainian human rights defenders continue to document his case and call on the international community to demand the release of Ukrainian civilians held on politically motivated charges.

Information used from open sources: Crimean Tatar Resource Center, Representation of the President of Ukraine in the Autonomous Republic of Crimea, ZMINA Human Rights Center, Crimean Human Rights Group, CrimeaSOS.

Date updated: 10.07.2026.