Arūnas Marcinkevičius, Mikhailov's lawyer, confirmed to BNS that a complaint has been filed and said that they are now waiting for the Strasbourg court's decision whether or not to hear it.
The lawyer would not comment in detail on the reasons for the complaint and Mikhailov's demands, but says that his client's human rights were violated in the criminal case.
An extended panel of judges of the Lithuanian Supreme Court last February upheld rulings by other courts that Mikhailov participated in the Medininkai massacre and that the killings were part of the Soviet policy of keeping Lithuania in the Soviet Union.
The Lithuanian Court of Appeals in June 2016 reclassified the criminal act committed by Mikhailov from a murder to a crime against humanity and upheld the life prison sentence for the man.
Mikhailov has been also ordered to pay 653,850 euros in damages to the Lithuanian state.
According to the Lithuanian law-enforcement, Mikhailov, being a member of the Soviet Interior Ministry's special police unit OMON and acting as part of a squad organized by Cheslav Mlynik, together with other members of the squad, Andrei Laktionov and Alexander Ryzhov, intentionally killed Lithuanian customs and police officers Antanas Musteikis, Stanislavas Orlavičius, Ričardas Rabavičius, Algirdas Kazlauskas, Juozas Janonis, Algimantas Juozakas and Mindaugas Balavakas, and attempted to kill Tomas Šernas.