Mykola Kyrylovych Lebed was a Ukrainian nationalist political activist and guerrilla fighter. Lebed was described as a "Ukrainian fascist leader and suspected Nazi collaborator", and later labeled as a "well-known sadist and collaborator of the Germans" by United States Army counterintelligence. He was among those tried, convicted, and imprisoned for the murder of Polish interior minister Bronisław Pieracki in 1934. The court sentenced him to death, but the state commuted the sentence to life imprisonment. He escaped when the Germans invaded Poland in 1939. As a leader of OUN-B, he was responsible for the massacres of Poles in Volhynia and Eastern Galicia.