[3] He became the first People's Deputy in the history of Ukraine who voluntarily refused the parliamentary mandate to show that he was not afraid of investigations against himself.

[5][6] On 8 October 2015 Martynenko said that the case against him was instituted without any grounds on the order of the pro-Russian energy lobby and oligarchs as while he headed the parliamentary committee on fuel and energy he defended the diversification of supplies of Russian gas and nuclear fuel, and the progressive law on the gas market adopted with the assistance of M.Martynenko did not allow billions of illegal super profits to be earned by the oligarchs [7] On 17 January 2017 the court ordered NABU to close the so-called "Martynenko case" within 10 days [8] but in the opinion of the former MP NABU took an unprecedented step - decided to illegally appeal against the court's decision which is based on the practice of the European Court of Human Rights, so it is final and can not be appealed.

[9] On 30 March 2017 Martynenko appealed to the National Anti-Corruption Bureau, the Verkhovna Rada, the President and ambassadors of the G-7 and the European Union in Ukraine on "political persecution, gross violations of the law and presumption of innocence".

Martynenko's defense said this had happened under pressure and at the insistence of lawyers, publishing a copy of the appeal to the Federal Criminal Court of the Swiss Confederation.

[12] On 28 June 2024 The Appeals Chamber of the Swiss Federal Criminal Court acquits the former Ukrainian parliamentarian Martynenko and a co-accused of charges of serious money laundering in the second instance.