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we know the victims represent a specific person to him.
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Who?
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Given the fact that he's the same age and race as the victims,
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likely a current or former wife or girlfriend.
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So why not just kill the actual person?
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She's just a scapegoat for his own personal failings.
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He knows if he kills her, he loses that scapegoat.
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So he just goes around blowing away any women?
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No, just women that remind him of his wife.
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When this type of killer is triggered,
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they need to release the resentment quickly.
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Subsequently, they tend to