the lib story on this incident is that the woman was wearing a black t-shirt that read "I can't breathe" which security would not allow
however RSBN reported she wandered off beyond a security barrier that civilians are not to cross.
https://www.tulsaworld.com/news/local/gallery-the-scene-when-the-gates-opened-for-president-trumps-rally-in-tulsa/collection_42d365bf-0bb4-5d2b-9865-755917797719.html#13