'27 Days Later: Mystery in Las Vegas' - a special '20/20' presentation tonight, 10 ET/9 CT on ABC

27 days after the Las Vegas massacre, still unanswered questions and conspiracy theories, new interviews and details about what really happened. "27 Days Later: Mystery in Las Vegas" - a special "20/20" presentation tonight, 10 ET/9 CT on ABC.
0:30 | 10/26/17

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Transcript for '27 Days Later: Mystery in Las Vegas' - a special '20/20' presentation tonight, 10 ET/9 CT on ABC

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