Hello, Your patient definitely requires a detailed psychiatric assessment. The precise nature and location of brain surgery need to be evaluated. On addition possibility of Complex partial seizure, impulse control disorder, organic psychosis, organic personality disorder etc will need to be evaluated. Hence my suggestion for you is that please seek a consultation with a psychiatrist near you for comprehensive assessment and further management. I do sincerely believe that his condition can be helped with proper treatment. Hope this helps you.Best wishes for your health and future.