Im curious, did your friends thought processes lead him to lure his parents one at a time, kill them and then elaborately cover up the crime and go about his business like nothing happened? Or did your friend kill his parents and just wait for LE to come and take him away?
I grew up with a guy who's BROTHER was diagnosed schizophrenic. He was a quiet, harmless young man. My friend, his brother was into drugs, fighting, Petty theft etc. One day my friend (the non schizophrenic) took a bat to the schizophrenic brother and began to beat him. The mother inserted herself over the schizophrenic brother and got herself beat to death by my friend. When he was done he dropped the bat and calmly waited for LE to arrive. His brother survived, thank God. My friend is in prison. I believe he also had severe undiagnosed mental issues that he self medicated for years. All the worry was for the schizophrenic brother, and it was the "normal" one that reigned hell upon the family.
But to get to my point. To be mentally disturbed enough to commit these crimes, doesn't point to the level of determination that Cozmo displayed. He had to commit the crimes, then gather himself yo normalcy enough to persuade another to follow him. WAY too organized. Enlist the help of his cousin. Then elaborately clean scene and go about town as if nothing happened. Nope. Nada. I vote psychopathic not schizophrenic.
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