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Mandalay bay hotel where the shooting happened. from where it happened. what do you have? >> reporter: at this point there are no clear signs of motive. no criminal history and no sign of mental illness. his brother said there are no ties to political or religious groups. those are the things you immediately look to. at this point we can say his one passion apparently was poker. high stakes poker here in las vegas. he had an affinity for guns. 23 guns found in his suite at the mandalay bay and 1...