As he was dropping off his family at 11 a.m. on the corner of Pennsylvania Avenue, Mr. Brinkley stopped to ask a Secret Service officer whether his wife could take the baby’s car seat into the White House. The officer saw Mr. Brinkley had an empty holster, which kicked off a traffic stop that ended in a search of the Charger’s trunk. Mr. Brinkley was booked on two counts of “high capacity” magazine possession (these are ordinary magazines nearly everywhere else in the country) and one count of possessing an unregistered gun.

Despite the evidence Mr. Brinkley had been legally transporting the gun, his attorney Richard Gardiner said the D.C. Office of the Attorney General “wouldn’t drop it.” This is the same office now showing apparent reluctance to charge Mr. Gregory.

Mr. Brinkley refused to take a plea bargain and admit guilt, so the matter went to trial Dec. 4. The judge sided with Mr. Brinkley, saying he had met the burden of proof that he was legally transporting. Mr. Brinkley was found not guilty on all firearms-related charges, including for the “high-capacity” magazines, and he was left with a $50 traffic ticket.