His lawyer Victoria Vinogradova told Kommersant about this.
It is noted that Ishchenko has the military rank of lieutenant, his military registration specialty is the commander of a mine-torpedo warhead, the combat use of anti-submarine and torpedo weapons of surface ships.
Ishchenko was detained in April in the case of defrauding equity holders.
Earlier, Deputy Prime Minister Dmitry Chernyshenko said that more than 70,000 Russians wanted to sign up as volunteers since the start of mobilization.
At the end of September, the State Assembly of Bashkiria submitted to the State Duma a bill on involving convicts to participate in a special military operation.