I get the feeling DN (if guilty of the crimes in question) may be the kind of guy who confesses and even commits suicide. He seems to have definite compulsions, especially if he is responsible for TW's death...sexual compulsions, rage compulsions, a lack of self control. He isn't an organized killer and in fact has benefitted from being a disorganized person in that he can't seem to make things work in one place for very long and is therefore hard to pin down as a suspect. His very troubled sense of self, his self-disgust, are evident in his social media posts. I think he genuinely struggles with self-hatred and a tendency to think of himself as a victim of others' lack of faith in him. If he had any self control, being on the run from murder (if he is guilty), he wouldn't have called attention to himself by wielding hatchets, etc. Laying low would have been the rational course, and a true psychopath would know that. As gruesome as the murders of Abby and Liberty might turn out to be, I think the violence done to them will be related to explosive rage rather than methodical cruelty. There are crimes that suggest careful planning and shrewdness and sloppy crimes of impulse and rage, and I think the latter applies in this case. This dude is not smart, not canny, and clearly left behind a lot of evidence and clues.