Here's a concrete example from about a month ago: sanitation workers in New Orleans went on strike, so the state ordered prisoners to pick up trash instead. Quite convenient to have a bunch of laborers that you can order around. https://www.wdsu.com/article/livingston-work-release-inmates...
Your "concrete example" doesn't say that any prisoners were forced to do anything. Many volunteer for work release to make money, get outside, and/or gain work experience.
If you have firsthand knowledge of any of these individuals being forced to work in this effort, by all means share it.
Slaves also weren't forced to do anything. They volunteered to work to avoid being whipped.
This user is referring to slave labour in prisons, explicitly allowed by the 13th amendment to the USA constitution.
Indeed. And note that black men are overrepresented in the prison population.