The father of Stephen Paddock was a psychopath according to the FBI and one or two brothers were likely involved as well. Likely paid to do it and premeditated blaming Stephen ( killing him ) to stop a trail and settle a family dispute. Whoever paid the shooters was/were cheered afterwards by seemingly random tweets of no sympathy for gun toting Repugs who like country music and/or are trumptards.
Source : I looked around on twitter and used my spidy senses which have been on high alert today. Apologies for the laziness. I am emotionally drained.
There is also a snapshot floating around twitter showing articles written about the shooter dated the last few days of September which makes the media ever more suspicious as well.