Ahmed Omar Saeed Sheikh, portrayed by Rajkummar Rao in 'Omerta', is a British terrorist of Pakistani descent who has been a member of militant outfits including Jaish-e-Mohammed and Al-Qaeda. In 1994, Omar kidnapped four foreigners to secure Kashmiri separatists' release. He also masterminded the murder of a Wall Street journalist in 2002, for which he was sentenced to death.