Clueless human, but what stops a company from ignoring these laws from certain states? How is this enforceable if a company doesn't have any infrastructure within that state?
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It would be pretty crazy if you could kill someone in Arizona and then just walk over the border to California and not be able to be prosecuted…
Not by the same definition, no, its not, though there is a crime called "murder" in all states, and there tends to be significant overlap in the definitions.