[Aliska]

If he was wearing that pink NASA t-shirt, there is one frame with a woman. And the woman described as HIspanic-looking with a man, medium height, who warned several in the crowd that they were going to die that night.

Then according to a woman they interviewed, she (and maybe he) was/were made to leave the performance venue. There may be nothing to it but the witness sounded sincere and wasn't present when the shooting started.

[LouieFisk]

While it’s a possibility, you’d think if she were there to warn people she would have told it to the security people who dragged her off.

[Hot Tabasco]

the witness sounded sincere and wasn't present when the shooting started.

Security had already removed her.......Likely just a nut job because if she had prior knowledge she would have gone to the police