In "Home Soil," who is the narrator?

The narrator is living in Chicago, and is doing well
financially because he owns a restaurant and an apartment building. We learn that he, as
a young Ukrainian during the Nazi occupation of Ukraine after the 1941 invasion,
participated in the Holocaust. He wrote pro-German propaganda and especially, on one
occasion, forced a group of Jews into a cattle car to be taken to an extermination camp
(paragraphs 31–36). This event remains fixed in his mind because even though he was
young at the time he participated in an inexcusable atrocity.