How would a psychiatrist explain Mr. Ewell’s state of mind in these chapters?

I'm not a psychiatrist but certainly Ewell has had his "15 minutes of fame" and is back to where he was before. Ewell suffers from mental problems, many of them brought on by ignorance and self-loathing. He shows signs of paranoia. By Chapter 29 Ewell becomes a predator of children. That's when he needs to be put down, similar to the old dog with rabies.