Crim­i­nol­o­gist James Alan Fox, of North­eastern Uni­ver­sity in Boston, said crime sta­tis­tics are used “as a barom­eter of safety and of police per­for­mance” and said mass shoot­ings should not be left out.

Police in Blacks­burg, Va., list zero homi­cides for 2007, the year a gunman fatally shot 32 stu­dents, fac­ulty and staff mem­bers on the campus of Vir­ginia Tech, located within the city limits. The shoot­ings are noted in Vir­ginia Tech’s campus crime report.

Killeen, Tex., does not list the 13 peoplekilled at Fort Hood in 2009 because it occurred on a mil­i­tary base, but it did count the 23 people killed in Luby’s cafe­teria in 1991. Okla­homa City, how­ever, recorded the 168 people killed at the Alfred P. Murrah Fed­eral Building in 1995, nearly dou­bling the state’s yearly homi­cide count from 226 to 400.

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