As a chief of Volnovakha (Donetsk region) police department in March 2014, Maiboros took part in the meeting on "federalization" of the southeastern part of Ukraine and implementation of the decision of Donetsk regional Council to hold a referendum on establishing the status of the southeastern regions of Ukraine.
The event was accompanied by public calls to change the regional borders as well as the state border of Ukraine. Maiboros did nothing to stop the spread of such appeals.
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Criminal proceeding under Paragraph 1 of Article 367 of the Criminal Code of Ukraine (neglect of duty) has been opened.