Police investigate Gregory's display of gun magazine on NBC WASHINGTON, Dec. 26 (UPI) -- A Washington, D.C. police spokesman said authorities are investigating whether NBC's David Gregory violated laws when he showed a 30-round gun magazine on air. Gregory displayed the magazine Sunday during a Washington interview with the head of the National Rifle Association, Wayne LaPierre. Politico said Gregory asked LaPierre whether fewer children would have died during the Sandy Hook elementary massacre if the gunman had access to fewer bullets. The Washington Metropolitan Police spokesman wouldn't comment specifically on what they are investigating, but cited Washington code violations and restrictions on guns. A section in the city's code says that no one "shall possess, sell, or transfer any large capacity ammunition feeding device regardless whether the device is attached to a firearm."