Sims had Langdon drugged, which triggered the amnesia and hallucinations, so he might be liable to aiding Brooks. Langdon had initially become associated with Inferno with the WHO. Zobrist required the WHO to sanction mass sterilization, which they turned down, and when he died WHO agents observed his handheld projector. https://alexiskidav.blogdigy.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-illuminati-song-oof-42098839