There's only three recognized tribes in Texas, the Tigua or Tewa Pueblo near El Paso, the Alabama-Coushatta a little north of Houston, and the Kickapoo near Eagle Pass. There are also several Cherokee communities in north Texas, none of them recognized, plus unrecognized groups calling themselves the Lipan Apache and Jumano Apache I'm not sure about, and one out and out twink outfit claiming to be "Tenskawitcha".
The Caddo were relocated to OK in 1859. There was a Lousiana group of Caddos forced to move there even earlier, 1835. If there is a group claiming to be Texas Caddo, they either stayed extremely well hidden or possibly have distant ancestry, "a family reunion wanting to be a tribe."
There's no mention of any of them staying in Texas at the Caddo Nation official website or at any of the histories the tribal site links to.
http://www.caddonation-nsn.gov/History.htmWhat's the fraud's name?