Human trafficking in our own detention centers?

As immigration enforcement has risen, it has enriched the private prison industry, including corporations such as GEO. What are the legal and ethical responsibilities of these institutions? Are they skirting rights protections of detainees because these are not government-run? Are they doing so because detainees are primarily undocumented?

This article exposes a detention center in Georgia that makes the prisoners work for extremely low wages to buy basic amenities that should be provided for them. Is this human trafficking?

https://www.cnn.com/2018/04/17/us/immigrant-detention-forced-labor-lawsuit/index.html