Hmmn... I see it differently. The grey is where the subsoil is showing. Note any pathways of truck traffic and you will see that grey color. What you see as a black covering is actually water mixed with decaying organic material. Rain water runoff filled this pit along with truckloads of remains.
Upon closer inspection, these do appear to be Mass Graves. These are not piles, they are pits surrounded by fill. "Think of the Worst and It's Worse."
The corpses are ground up and limed at the Rendering Facility. Then they are transported to the Composting Facility where they are processed into fertilizer.
This looks like a legit composting operation. Except based on the evidence at the prison, they are most likely composting the bodies that are processed at the Rendering Facility:
Wow! I'm going to reinvestgate that area of the Google satellite images. Meanwhile, here's an aerial view of a typical Maryland Poultry Farm. This is fine for raising chickens. Not a great look as a Death Camp for disappearing humans. Senator Van Hollen has Delmarva farm constituents so he has seen.
There is no financial incentive for CECOT to keep US-deported prisoners alive. To make room for more prisoners, the population is likely culled. Note the "prisoner pen" oozing human waste. People may be confined and starved in unimaginable conditions. A profit-driven extermination camp with US ties.
Prisoners at this facility are NOT fed any meat. Therefore, there is NO need of a livestock slaughterhouse on site. Then what is the origin of all of this BLOOD???? I feel like I'm going to pass out just thinking about it. Centro de Confinamiento del Terrorismo (CECOT). G5MV+CX, Angulo, El Salvador.