As many others have pointed out, you're arguing in bad faith.
Everyone knows damn well that a local story in a local newspaper will not have another source until maybe a national source picks it up, and guess what, those national sources will look at the fact that the Texas Observer is a fully trustworthy source who did the legwork on this story, and they will link back to it.
It's a 100% true, horrific story.
Or do you not believe that cops would do this sort of thing repeatedly in several states. Here's a selection of past stories on teens, and young teens at that, put in solitary for way longer than should ever be allowed. Watch out for the 13-year-old who committed suicide because of it, that one is a rough read.