The rate of executions increased during the final months of the camp. The SS liquidated prisoners who they suspected might try to escape or organize resistance; most of the victims were Russians. Some of them were high-profile prisoners who had been kept alive previously for interrogation. During the last days of the camp's existence, the SS executed thirteen Allied secret agents and seven prominent German anti-Nazis, including former "Abwehr" head Wilhelm Canaris and the Confessing Church theologian Dietrich Bonhoeffer. In all, the SS had executed at least 2,500 people at Flossenbürg.