Statistically, it HAD to happen at some point.
On a macabre note, at least it was better marksmanship than NYPD:
Dead targets, live bystanders.
Not to thread jack *cough* but according to my wife (this is a local story for us) the two shooters both landed 5 of 5 shots on each other. So, uh, "yay!" for accuracy.
Also, one of the CCW holders lost his permit in 2006 due to a DUI. He also had a loaded handgun in the car when pulled over for DUI. With a BAC of .18 he should have lost his permit for life by Michigan law but the police didn't charge him for that because the gun had nothing to do with him being pulled over so they let it slide.
In hindsight maybe they should have pulled that guy's permit. When you pay upwards of $125 bucks to get a legal education on carrying a gun in our state and then violate the piss out of the law you're showing some pretty poor judgement. It's illegal to carry a gun in Michigan with a BAC of 0.20 -- that's one beer. His BAC was .18 which isn't just legally too much to drive a car... that's drunk. Very drunk.