The doctor who witnessed Bonhoeffer’s execution described it this way:
Early the next morning, April 9, Bonhoeffer, Wilhelm Canaris, Hans Oster, and four fellow conspirators were hanged at the extermination camp of Flossenbürg. The camp doctor, who had to witness the executions, remarked that he watched Bonhoeffer kneel and pray before being led to the gallows. “I was most deeply moved by the way this lovable man prayed, so devout and so certain that God heard his prayer,” he wrote. “At the place of execution, he again said a short prayer and then climbed the steps to the gallows, brave and composed. . . . In the almost fifty years that I worked as a doctor, I have hardly ever seen a man die so entirely submissive to the will of God.”
Resurrectio et Vita 