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Sp...now finished all 6 episodes, and you were right...the end was expected but still shocking. He is currently residing in a mental health unit, awaiting trial in California. I was continually disturbed by his manner and appearance during the filming of the documentary...his enormously dilated pupils, for instance. To my untrained eye, he is obviously mentally ill.
According to his Wiki entry, he is also now suspected of at least 3 other murders, some of which involved dismembered bodies.
A truly scary man.