All drug development is accompanied by a large number of failures. The Brotherhood drew inspiration from the concept of "experimenting with poison" and handed over a group of people to a biopharmaceutical company with which they had long collaborated. These monstrous Abnormal Creatures were the products of failed experiments.
They had lost consciousness and reason, only retaining the most basic biological instincts for eating and hunting.
The greatest flaw of these Aberrations was that their healing abilities were so potent that they were alarming. Even if stuffed into the shredder machines at the Garbage Disposal Plant, they could regenerate from a mass of minced flesh. They had tried countless cruel methods, but none could completely destroy these failed experiments.
So, the Brotherhood had transported these failures to an uninhabited desert to let them perish on their own.
And now, these Aberrations had actually died.