He wasn't worthy enough as a human being, if you can even call him that, to live with anyone in the general population or even in prison, whether in poverty or not.
I don't care that he was a human. Simply being a human doesn't automatically exempt someone from suffering the consequences of their actions. He aided in the suffering and death and many people, and then someone shot him as a result of his actions. That's just cause-and-effect, and I would even go so far as to say that it is justice from a certain perspective. 1/2
I may be dehumanizing him, but it is for good reason. It's because he has dehumanized himself through his behavior and choices. If someone is going to willingly act in an antisocial manner as Brian Thompson has, then it would be anything but appropriate to treat them in any other way than antisocially and dehumanizingly. 2/2