I am of the opinion that ET and TC are laying low, off the grid somewhere, most likely at a remote campsite , or less likely but possibly a shady, cash-only motel - much like the case of the poor 13-year-old girl and her baby from IL as mentioned earlier in the thread.
Now that ET is completely under his control, I don't believe TC is going to be very nice to her. I think the beach-, fruity-drinks-, pretty-sunset-type IG posts were all part of the grooming process on his part - just part of his ploy to get her to do whatever he wants her to do. I think now it's more like sleeping under a tarp, drinking beer, going to the bathroom in the woods, etc. at this point.
With most girls ET's age, they wouldn't put up with it -I know my 14-year-old would be going out of her mind ...-, but in ET's case, if she has indeed been subjected to abuse at home as reported, she might be willing to tolerate it (which I'm sure TC picked up on), which may make the task of finding them a little more difficult; I don't think she will try to run away from him at least for a while. We really need people -at gas stations and convenience stores in particular- keeping an eye out for them.