This is an A&E special on Ronald Defeo, best known for murdering his entire family in Long Island, New York. One of the focal points of this particular case (as you will see) was Defeo's state of mind at the time he committed his crime. Was he in the "right" state of mind or did he perhaps suffer from a mental illness that caused him to (temporarily) lose his mind? Did he know what he was doing? And did he know what he was doing was wrong? These as you will see after reading the chapter, are the primary components when determining defendants