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Because he knows what they're doing is WRONG but he dasn't say it out loud. So, his colleagues stick him back into the basement and hope he doesn't blurt out the truth at some point.
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So many details don't follow a narrative, no wonder they didn't want to answer any questions or provide information at the beginning of this CRIME. They had quite a few details to hide in order to complete their mission of breaking the law in plain sight!