who was the man who approached corrie after she spoke in a church in munich?

At a church in Germany, filled with great devastation, Corrie sees a former SS agent who stood guard at the shower rooms in Ravensbruck. After the speech, he approaches Corrie and tells her that he has become a Christian. She struggles to shake his hand, but feels at peace when she forgives him. She realizes that God not only gives the command to love, he gives the love as well.