Search for a Motive

The perpetrator of the latest American mass shooting—at the elementary school in Newton Connecticut—also killed himself and his mother. In addition, Adam Lanza smashed his computer hard drive before he went on his rampage. This, we are told by the investigators, is going to make it harder to find what motivated Mr. Lanza to do such a horrible thing.

When we say we want to find the motive for a crime, what we want is a clear, logical, rational explanation for an action that makes it understandable. However, when someone does something of this nature—a mass killing—you can be sure they were not thinking clearly and rationally. Sure they could think clearly about the guns, ammunition, clothing, etc., but this deludes us into thinking that the motivation for their action is also rational.

Dr. James Gilligan, a psychiatrist who directed the Center for the Study of Violence at Harvard Medical School and was in charge of psychiatric services for the Massachusetts state prison system for ten years, begins his book, Violence, with this message: “The first lesson...is that all violence is an attempt to reach justice, or what the violent person perceives as justice, for himself or for whomever it is on whose behalf he is being violent…Thus, the attempt to achieve and maintain justice, or to undo or prevent injustice, is the one and only universal cause of violence. [italics in the original]

I think Dr. Gilligan gives us the guidance we need in our search for a motive: somehow, for Adam Lanza this action was an attempt to achieve justice. It’s not too hard to imagine how Mr. Lanza might have perceived that his mother had caused him an injustice, but it’s much harder to get a handle on how killing children could undo or prevent injustice. I suggest we’ll never know for sure. All we can know is that in some way this action helped Lanza, in his mind, right an injustice that he believed had been done to him.

Dr. Paul Steinberg, also a psychiatrist, published an op-ed about schizophrenia in last week’s New York Times. Two of the pertinent points he makes are: disorganized thoughts are a component of the disease, and many people with schizophrenia don’t know they have it. It’s very possible, Dr. Steinberg writes, that Mr. Lanza was schizophrenic and was motivated by delusions:

Schizophrenia is a physiological disorder caused by changes in the prefrontal cortex, an area of the brain that is essential for language, abstract thinking and appropriate social behavior. This highly evolved brain area is weakened by stress, as often occurs in adolescence.

Psychiatrists and neurobiologists have observed biochemical changes and alterations in brain connections in patients with schizophrenia. For example, miscommunications between the prefrontal cortex and the language area in the temporal cortex may result in auditory hallucinations, as well as disorganized thoughts. When the voices become commands, all bets are off. The commands might insist, for example, that a person jump out of a window, even if he has no intention of dying, or grab a set of guns and kill people, without any sense that he is wreaking havoc. Additional symptoms include other distorted thinking, like the notion that something — even a spaceship, or a comic book character — is controlling one’s thoughts and actions.

Schizophrenia generally rears its head between the ages of 15 and 24, with a slightly later age for females. Early signs may include being a quirky loner — often mistaken for Asperger’s syndrome — but acute signs and symptoms do not appear until adolescence or young adulthood.

People with schizophrenia are unaware of how strange their thinking is and do not seek out treatment. At Virginia Tech, where Seung-Hui Cho killed 32 people in a rampage shooting in 2007, professors knew something was terribly wrong, but he was not hospitalized for long enough to get well. The parents and community-college classmates of Jared L. Loughner, who killed 6 people and shot and injured 13 others (including a member of Congress) in 2011, did not know where to turn. We may never know with certainty what demons tormented Adam Lanza, who slaughtered 26 people at an elementary school in Newtown, Conn., on Dec. 14, though his acts strongly suggest undiagnosed schizophrenia.

Mother Jones magazine has put together an interactive map that shows the locations of mass shootings in the U.S., along with information about the killer, weapons used, number killed, and whether the shooter had shown evidence of mental illness. From their research, the majority had shown signs of mental illness before they killed.