I am trying to track down a story I read years ago.  It might be by Ralph Ellison but I am not sure.  The narrator works at a hush-hush government facility where Black people are being rounded up and detained.  He reads one of their letters home.  Eventually he learns that they are being used for food a la “Soylent Green.”  One character accuses him of being a  “n—-r eating SOB.”  The story ends with the narrator repeating  “My wife is having a baby.  I have eaten human flesh….”   Thank you.