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the killer had ties with the victim and invited her out so he should have accepted
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the victim agrees to go with the murderer she should not have had suspicions
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in the car the killer consumes weed, the victim may also have consumed
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the victim begins to talk with the murderer, may have noticed strange behaviors
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the killer lights the fire could have used gasoline
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the victim puts on a scarf, it could have been her
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the killer puts his backpack next to him, he could have been very suspicious
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the killer surprises the victim and knocks her out with chloroform should have been quick
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the murderer proceeds to gag her, it could have been so that she didn't escape
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they arrive at the lake and begin to accommodate their things, the victim may have suspected