The case against Larry Taylor for driving under the influence was straightforward. In December 2010, he rear-ended an SUV in Northwest Wash­ington. He was slurring his words, according to police reports, and his blood alcohol level was 0.161, double the legal limit.

The case against him for the unregistered gun police found in his truck? Not so simple. In a January order, District of Columbia Superior Court Judge J. Michael Ryan found the police search of Taylor’s truck had been unlawful. The U.S. attorney’s office is appealing the ruling, which suppressed all evidence of the gun.