Dr. Sean Grier was a researcher at Gentek who was involved in the development of Bloodtox. Alex Mercer retained a memory of Grier explaining about the Bloodtox to Dr. Raymond McMullen.

Node of IntrigueEdit

Sean Grier: "Substance A-113A -- which we call Bloodtox, due to its odd coloration -- is a poison which only affects the Blacklight virus."
McMullen: "Side effects?"
Sean Grier: "It shouldn't affect humans at all."
—Grier, explaining about the Bloodtox[src]

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