I was reading about brain injury recently, particularly in the frontal cortex. It could be a result from a number of things but the two that stood out for me was drug abuse and degenerative diseases. He has both. The advice was to follow the DBT which I thought, great! He is already. I mentioned this to him, as a possibility. He was receptive to it. So DBT for me seems to have had a greater positive impact on him than seeing a therapist. I am going to nudge him in the near future again.