There are *always* unreliable live reports when something like this is going on. Any one individual is seeing only a small piece of it, and there is panic. When you don't know what's happening then everything is suspicious. Look at any similar event and you see the same kind of wild rumors while it's happening. You should learn to expect that and realize that most of it won't pan out.
Should you believe the wild unreliable panicked live reports, or the results of careful after the fact investigation? A rational person knows the answer to that one.
Very good HD video of the whole area from the Tropicana. should pin point where they shooter was located.