During the German occupation of Poland, the priest, Fr. Maximillian Kolbe, SP3RN was arrested by the Germans. They believed his amateur radio activities were somehow involved in espionage.
He was transferred to the Nazi death camp Auschwitz on May 28, 1941. After some prisoners escaped in 1941, the Germans ordered that 10 prisoners be killed in retribution.
Fr. Kolbe was martyred when he volunteered to take the place of one of the condemned men. He was given a lethal injection of carbolic acid.
On Oct 10, 1982, he was canonized by Pope John Paul II as Saint Maximillian Kolbe, Apostle of Consecration to Mary and declared a Martyr of charity. He is considered the Patron saint of Amateur radio operators.