GEO Group is a publicly traded company that makes money for its shareholders by owning and operating prisons and detention facilities. Put more simply, it's a company that profits off of human misery. They have appeared in this newsletter from time to time, always in stories involving humans being subjected to inhumane conditions and horrific treatment.
Martin Vargas Arellano was being held in a GEO-run prison in California. Under this for-profit prison company's oversight, he contracted COVID-19 and died after a series of resulting complications. A recent lawsuit has been filed holding GEO responsible for this death due to gross negligence (that is, they didn't care that a human whose well-being they were responsible for might die on their watch).
This is a major case and potentially a major step in holding private prison contractors responsible when they harm people through profit-driven negligence. And, apparently, the plaintiffs keep needing to officially amend their complaint because the process of discovery has been uncovering so much material to use against GEO.