"Paul Michael Merhige Is Sixth Concealed Handgun Permit Holder to Commit Mass Murder in 2009," screamed the headline of a recent communique from the Coalition to Stop Gun Violence.

Merhige killed four family members in Florida on Thanksgiving. The event was a tragedy, as all homicides are.

Statistics about the number of people who are licensed to carry a concealed handgun are spotty, because not all states publish such information. However, Florida alone has 600,000 concealed-carry permit holders.

Let's see. Six mass murders (that's defined as three or more victims) in 2009. Assume all of the perpetrators were licensed in Florida (they weren't, but never mind). Six out of 600,000 is . . .

One one-thousandth of 1 percent.

Incidentally, after Florida adopted a "shall-issue" concealed-carry law, crime fell.