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Private Notes
A shocking online video brings together a widespread internet group of animal lovers out for justice. Their target, meanwhile, has more horrors planned.
A new video pushes panic to the next level, galvanizing the "internet nerds" to intensify their own painstaking investigation as police join the hunt.
With the killer's identity -- and twisted motives -- revealed, the group finds more key clues as the global police manhunt reaches a fever pitch.
