Daniel Alexeyevich Sysoev (Russian: Даниил Алексеевич Сысоев; 12 January 1974 – 20 November 2009) was a Russian Orthodox priest, rector of the Moscow Church of the Holy Apostle Thomas on Kantemirovskaya, and a prominent missionary.
Sysoev was killed in his church in Moscow by a masked gunman on 19 November 2009.[4] According to investigators, the killer was Beksultan Karybekov, born in 1987, a native of the city of Osh, Kyrgyzstan.[5] Some Orthodox Christians revere Daniil Sysoyev as a martyr and expect his canonization in the future.[6][7][8][9]