馬卡洛夫手槍
A Georgian citizen of Armenian origin, Mardun Gumashyan was subsequently charged as the mastermind of the shooting. As stated in the indictment, Gumashyan was born in Georgian region of Marneuli in 1951. According to the version of the prosecution Gumashyan had founded a criminal group, which embraced Farda Gadirov, Javidan Amirov, Nadir Aliyev and Najaf Suleymanov; Gumashyan had struck a bargain with them to commit a terrorist attack offering them $50,000 and paying $5,000 to Gadirov, who purchased a Makarov pistol and practiced to shoot. The terrorist group arrived in Baku in March 2009.