Killer: Joe Carroll, played by James Purefoy, is an Edgar Allan Poe scholar who murdered girls in the poet's honor -- until he was caught and imprisoned. Modus operandi: Carroll once did his own Poe-inspired dirty work, but since being jailed, it appears he is using the Internet and social media to recruit followers who continue his bloody business. Still at large? It remains to be seen whether Carroll will hatch a successful escape plan, but his cult-like followers are certainly at large.
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