Feygin said on air of 112 Ukraine TV channel, Censor.NET reports.
"It is even unclear whether the arrest was sanctioned by a court or not, since she (human rights activist Zoya Svetova - Ed.) found him (Roman Sushchenko - Ed.) in the prison's quarantine zone. Persons who have pretrial restrictions imposed against them are usually held in this place," he said.
According to Feygin, it was confirmed that Sushchenko was accused of spying.
"He will be provided with a publicly financed lawyer. This is a known combination when a person is provided with a controllable defender. The case is run by the FSB," he added.
Earlier, members of Moscow Public Monitoring Commission have found correspondent for Ukrinform news agency Roman Sushchenko in Lefortovo prison. The Lefortovo court of Moscow arrested the journalist on charges of espionage (article 276 of the Criminal Code of the Russian Federation).
Later, Ukraine's Information Policy Ministry confirmed the detention of Sushchenko. The ministry said its legal department was collecting necessary information on the circumstances and reasons for the detention.
In turn, the FSB (Russian Federal Security Service) claims Ukrainian journalist Sushchenko is the agent of Main Intelligence Directorate of the Ministry of Defense of Ukraine: "The case was initiated into charges of espionage."
Related materials: Ukrainian hostages in Russia
Ukrainian citizen Panov, charged with terrorism in Russia, died in pretrial detention center in Rostov, - Fontanka. PHOTO(0)