I don't know what happened leading up to him getting tased but I was right there through this clip. You can see two cops in this clip. There are another two at his feet. There are also 2 or more Securitas employees in the area. You can see my foot in the cover still of the video; the blue sneaker with the white outsole.
I was already working on diffusing another situation when I saw a cop suddenly start for the aisle between 236 and 237. I immediately ran over to the top of the staircase to see what was going on. I saw the guy yelling back and forth with the police and staff and he was near enough that I could grab him. I reached over the railing and grabbed him and repeatedly asked him to calm down. They were pushing him up the stairs faster than he could walk. They pushed him to the ground. I grabbed him under his arms and tried to pick him up. Again, asking everyone to calm down. As I'm trying to help him up, another cop runs up through everyone and between me and the man on the ground screaming, "TASER! TASER!" and just jabbed his weapon into his chest and fired.
This was an awful situation.