According to Dr. Michael Stone, 96.5 percent of mass murderers are male, and a majority aren’t clinically psychotic. Rather, they suffer from paranoia and often have acute behavioral or personality disorders. Stone, professor of clinical psychiatry at the Columbia College of Physicians and Surgeons in New York City, has closely examined the minds of 208 mass murderers. “Usually you’re dealing with an angry, dissatisfied person who has poor social skills or few friends, and then there is a trigger that sets them off.” - Daily Beast
"He appears to have sought companionship through the Web site Adult Friend Finder, posting a photo of himself with bright orange hair and saying that he was ‘looking for a fling.’ In an online profile, he described himself as a nice guy, or as nice as any man ‘who does these sorts of shenanigans’ …: — New York Times
"Two months before ((the killings)) James Eagen Holmes was scheduled to conduct a seminar on how the tiniest bits of genetic material can signal psychiatric and neurological disorders. Whether or not he actually delivered his talk on micro RNA biomarkers is not yet clear, and he has since dropped out of the graduate neuroscience program at the University of Colorado Medical School in Denver." — Daily Beast
"Madness, as you know, is just like gravity. All you need is a little push." — The Joker (Heath Ledger) in Christopher Nolan’s The Dark Knight
"I am the Joker." — Words allegedly uttered by James Eagen Holmes before he opened fire at a midnight opening of The Dark Knight Rises, killing 12 people and wounding 59 others.