The conversion of Russia to Christianity was effected, it would seem by a monster of cruelty and lust. That Vladimir (980 - 1015) was a fratricide, who maintained 3,500 concubines, has not prevented his canonization as a saint.
b) A person who commits this crime.
From January on, Third Army also spent a good deal of energy trying to solve the problem of fratricide, the killing or injuring of ones own forces by what is ironically called friendly fire,...
Wikipedia foundation.