I followed it on TV from the first reports that night until early morning. I saw many distraught crying witnesses, but not one tear. I saw many being carted off to ambulances on gurneys, but not one drop of blood anywhere. Not even a red stain on the white sheets that covered them. That's a big clue to start with. It looked more like a cheap scripted soap opera than a chaotic mass shooting.

Edit 10/5/2017: Answering a reply here brought back a memory from watching vids early just after the news reports started hitting the headlines on the net. I immediately did a google search for videos or live streams on site. I hit on a page that had a long line of vids taken on site apparently taken on cell phones. What happened will sound crazy because it IS crazy. My cable internet has big bandwidth, but the mini pc i was using at the time loads slowly with only 4 gigs of ram. This results in issues with pages that contain lots of ads and scripts and videos to load. Ok what happened was the first vid on the page loaded and gave me the play arrow which i clicked immediately. The video started to play. But what happened (as it often does on script loaded pages) is the page started what appeared to be a reload of the page to include more vids and scripts. The video was playing at around the 5-10 second mark when it paused because of the reload. The scene i was watching was of chaos and people running, attempting to escape. When the page froze for the reload the frame it paused on was nothing at all about people running and screaming. The frame in the video was what appeared to be a plain white background with a plain black line pencil or ink drawing of a Knights Templar Knight dressed in full battle armor with spear in hand. I KID YOU NOT. This was not an ad. It had no words. It was a simple pencil or pen and black ink drawing on white background. That is all. Of course my jaw dropped open, and when the page loaded fully i attempted to replay the first 10 seconds over and over stopping it frequently attempting to grab that frame again, but i could not get a repeat. Why was it there? Don't ask me, all i know is i saw it replace the scene of screaming running music fans. It was probably a 2 second pause while the page reloaded. Maybe some subliminal bragging? Who knows. I only know what i saw. I just moved on and did more watching and listening.