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We don't [music] want to accept that there's evil that walks amongst us, but it does.
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>> You know how when you meet somebody, you can't put your finger on it, but something's not right.
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>> You never know what anybody is capable of. >> I am a serial killer who's only killed
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once. >> Did you think [music] when this goes public, this town's going to be shocked?
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>> Absolutely. When you're dealing with a 30-year-old cold case, it seems like there's not a
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lot of hope. >> We knew there was a [music] monster out there and we were going to find him and
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get him. >> Look at him just coming around the corner like that. >> We started tracking the area.
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>> When did this accident scene become a crime scene? >> Police. >> You called him a lying liar who lies
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about lying. >> Do you know why we're stopping you today? What makes you so sure that you
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stabbed your sister while you were sleepwalking? >> I never got a chance to see her one last
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time. >> Such an injustice. [music] I can't believe they did this to her. No matter how hard it gets, never give up.
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>> I'm Matly Morales with 48 Hours. Did you have anything to do with Joanna [music]
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Hunter's death? >> This is a family that just wants justice.