The case was brought under part 2 of article 263 of the Criminal Code of Russia (violation of traffic safety rules and the operation of air transport, resulting in the death of a person through negligence).
The UK considers the pilot error, technical malfunction, adverse weather conditions as the main versions of the helicopter crash.
Earlier, State Duma Chairman Vyacheslav Volodin expressed condolences to the relatives and friends of Deputy Ayrat Khayrullin.
On February 7, State Duma deputy Airat Khairullin died as a result of the crash of a private helicopter in Tatarstan. Two more people were seriously injured and were hospitalized.