Investigators don’t know whether he visited the chat rooms for personal reasons or for surveillance before carrying out the brutal attack early Sunday at the Pulse gay nightclub in Orlando, killing 49 people and wounding more than 50 others.ĭays after the attack - the deadliest mass shooting in U.S. Orlando nightclub gunman Omar Mateen visited online gay chat rooms despite expressing outrage at the sight of two men kissing and making inflammatory comments about gays, law enforcement officials said. Please look at the time stamp on the story to see when it was last updated.

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