PolitiFact: Data doesn’t back claim on those killed with own guns

Documentary filmmaker Michael Moore’s response to the mass shooting in Las Vegas was to propose rewriting the Second Amendment, providing a laundry list of statistics to support his arguments for increased gun control.

Polling shows that self-defense is the top reason most gun owners purchase their weapons, but we wondered whether Moore’s numbers were right. We attempted to contact Moore to learn what sources he used, but didn’t hear back. The figures we found in both cases are difficult to confirm, even for the experts.

Problem No. 1: The term “home invasion” isn’t necessarily used in crime-tracking data. Broadly, it usually describes a break-in at a residence while the people who live there are present, or more specifically, when someone breaks into a home to rob or hurt the residents. Some jurisdictions use it and some don’t, but there is no universal definition or data set.

The Centers for Disease Control and Prevention’s National Violent Death Reporting System tracks the location, weapon and crime being committed at the time of a violent death. But there’s no distinction about whether it was during a home invasion, or with the victim’s own firearm.

The Federal Bureau of Investigation’s Uniform Crime Report and its Supplementary Homicide Report, which compile data voluntarily provided by local law enforcement agencies, track the number of homicides and whether another crime was being committed. Home invasion is not a specific category, however.

Several experts on firearm statistics told us they hadn’t seen a recent study on either home invasions ending in homicide or who owned the weapon used, but Moore’s first point sounded somewhat reasonable.

When we checked 2015 FBI figures, for example, there were 13,455 reported homicides, and 102 of those happened during burglaries. That’s 0.76 percent of all homicides — but there was no mention of the term home invasion, or the weapon used to commit the homicide.

It turns out there is one study that did come close to defining things the way Moore did, but Moore overstated the reported figure.

A 2010 report from the U.S. Bureau of Justice Statistics noted that “between 2003 and 2007, approximately 2.1 million household burglaries were reported to the FBI each year on average. Household burglaries ending in homicide made up 0.004% of all burglaries during that period.”

That’s about 86 people killed during a burglary annually, but the 0.004 percent is from all burglaries, not just ones classified as home invasions. Furthermore, the report’s 0.004 percent is 10 times less than the 0.04 percent figure Moore stated.

The study also does not specify a gun was the murder weapon, but rather counts every homicide regardless of how it was committed.

Shannan Catalano, a statistician at the Bureau of Justice Statistics, said Moore appeared to take the figure from her study but for some reason got the percentage wrong.

Like everyone else we contacted, Catalano also did not know of a statistic that supported Moore’s second assertion about a third of people being killed with their own gun during these attacks at home.

Our ruling

While Moore has a point that guns are rarely used when someone breaks into a home, it is difficult to confirm. We only found one study that came close to supporting Moore’s assertion about the number of home invasion deaths. Even then, the report’s author said Moore misstated the scope and specifics. Our sources conceded that the homicide rate during burglaries is a tiny fraction of overall gun deaths. But none of them, including federal agencies that track crime, could independently verify Moore’s figures about the owner of the weapon used in those crimes the way he claimed.

We rate this statement Mostly False.

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