Jean DeLynn Baker is a "4400" who has the ability to grow toxin-emitting spores on her hands. When her power manifested during her sleep, wiping out her whole town's population, including her parents, her already unbalanced mind finally caused her to go insane from shock, and eventually regains her lucidity when she comes to believe her purpose is to purify humanity. Diana Skouris was forced to shoot her to keep her from wiping out Seattle's population.
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