He's clearly still in full command of his capacities at least as it comes to elucidating his thoughts in words, and everything he says is reasonable enough that I would believe it quite straightforwardly (as I did back when the raid news first came out) if it weren't for the notion planted in my head now from Wise's article that he's a scheming psychopath that's very charming and knows just what to say to make people believe him.
Either way, this guy has a crazy shit life. If everything is true in Jeff's article about his past and current life, I'd have to believe that he probably is just a scheming possibly paranoid psychopath, though still a little skeptical that he shot his neighbor to death. Fully plausible either way as I see it however, wouldn't be surprised at either outcome.
Also, I definitely hear the words "kill him" and "that's what he fucking needs" in that recording with all the background noise he sent out. Who knows what it is though.