What can one say about an executioner?

We have seen Anwar Congo in Joshua Oppenheimer's documentary, The Act of Killing: the thug from Medan proudly admitting that he killed many 'communists' in the mid 1960s, but in the last scene is almost completely silent; all you can hear is him coughing in the former execution house, just an old man exhausted from going down the stairs

When the film ends, there is no story about what happened to Anwar Congo righ