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Inside an Arsonist's Mind

Anger the Likely Motivation Behind California Fires
WebMD Health News

Oct. 29, 2003 -- As California continues to burn, authorities reportedly believe that arsonists started most of the 10 fires that already have claimed at least 16 lives and an area the size of Rhode Island.

The question is why.

"The truth is, very little is known about arsonists because so few arsons are solved," says psychologist Joel Dvoskin, PhD, ABPP, of the University of Arizona Medical School and a member of the American Board of Forensic Psychology who has done work on the psychological motivations behind arson.

Still, he tells WebMD that studies indicate that the most common reason for arson is profit. "Buildings are often set on fire for insurance purposes," he tells WebMD. "But certainly, that doesn't fit the pattern of what's happening in California."

For those fires, based on what's known, anger is a more likely explanation for what has resulted in one of the most widespread and expensive disasters ever to occur in that state -- engulfing some 600,000 acres and 2,000 homes.

Brains and Arson

According to a 1987 report in the FBI Law Enforcement Bulletin, the vast majority of "profiled" arsonists have a below-normal IQ -- typically between 70 and 90. About one in four fall in the below-70 IQ range that qualifies them as mentally retarded -- not to say that all mentally retarded children are going to grow up to be arsonists.

"In these types of cases, arson is often committed by someone who is retarded but also angry. It's that combination that is a catalyst -- their anger but having fewer means to express it," says Dvoskin. "Honestly, I can't think of a single arsonist I've dealt with for whom anger wasn't the primary motivator."

In the FBI report, as well as statistics by the U.S. Fire Administration, part of the Department of Homeland Security, half of all arsons are committed by those younger than age 18; the other half is typically in their late 20s. In arson cases involving older people, the motivation is usually for profit. About 90% of all arsonists are male and they are usually white, states the FBI report.

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