More TV-watching in childhood was also linked to a greater likelihood for aggressive behaviors, negative emotions, and antisocial personality disorder.

FORBES: Could Too Much TV In Childhood Lead To Antisocial Behavior In Adulthood?

Those who study the psyches of criminals said Dorner's aggressive and self-aggrandizing rant indicates a classic case of malignant narcissist personality disorder.

NPR: Court File: LA Ex-Cop Was Disturbed, Self-Obsessed