An investigator suspects accelerant use, but fire debris laboratory analysis returns a negative result. What should be considered as a possible explanation?
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A
The investigation must be closed immediately due to lack of evidence
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B
Highly volatile accelerants such as acetone or alcohol may have fully evaporated before samples were collected
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C
Negative laboratory results prove arson is impossible in this case
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D
Canine alerts in this case were definitively false positives