Big Whoop

Two guns used in high-profile shootings this year at the Pentagon and a Las Vegas courthouse both came from the same unlikely place: the police and court system of Memphis, Tenn.
Law enforcement officials told The Associated Press that both guns were once seized in criminal cases in Memphis. The officials described how the weapons made their separate ways from an evidence vault to gun dealers and to the shooters

The guns went into the system of FFL dealers, record keeping, background checks etc etc, so what that they were LE surplus guns, it wasn't like the cops were out on street corners selling them out of the trunk of a cruiser.

Appears these guns dropped out of system completely