So it appears the post was made during the attack... Unless someone faked the Facebook page after the fact and altered the times on it so http://archive.is could take an invalid snapshot of it. If that's even possible. -or- I got the time conversions wrong :^)
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I just archived my own facebook page. It converted all the times to UTC as well. You can try with your own.. It unfortunately looks legit. I still doubt its his real motivation, but he probably is the one who posted that insane BS while driving.
End of conversation
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