Sytnyk said at a briefing in Kyiv on Monday Censor.NET reports citing Interfax-Ukraine.
"Have you listened to those tapes? All these statements are made to politicize the case while these allegations can never be substantiated by evidence," Sytnyk said.
"I think that he (Onyshchenko - Ed.) has a lot of tapes. He probably wiretaps everyone including himself even when he is alone, but they do not carry sufficient evidence to say that those sweeping pronouncements he made could be ever confirmed," he added.
On March 16, the NABU raided the office of Onyshchenko. It stated the searches were carried out under the pre-trial investigation into abuse of office during the sale of natural gas extracted jointly with Ukrhazvydobuvannia SE.
Later, the NABU requested the Prosecutor General's Office (PGO) to remove the immunity from people's deputy Onyshchenko. Moreover, the NABU and the PGO claim Onyshchenko is involved in embezzlement of 1.6 billion hryvnia (approx. $64.02 million).
On June 16, Prosecutor General Yurii Lutsenko issued a motion requesting Verkhovna Rada's consent for criminal prosecution, arrest, and pre-trial detention of Onyshchenko. On July 5, the parliament approved the detention and arrest of the lawmaker.
The suspect himself stated he was busy with the preparation for the upcoming Olympics and not going to react to NABU's actions. On July 29, Onyshchenko said he was in the U.K. and had applied for political asylum.
On Dec. 1, 2016, the Security Service of Ukraine (SBU) announced it suspected fugitive MP Onyshchenko of high treason. As noted, the MP acquired Russian citizenship in exchange for cooperation with Russian authorities to destabilize the situation in Ukraine. On the same day, Onyshchenko said he had provided compromising materials against President Poroshenko to the U.S. intelligence.
Related materials: Onyshchenko case