A Waterloo woman has been arrested after police found a machine pistol and a large amount of methamphetamine in her possession after a traffic stop, according to the Waterloo Cedar Falls Courier. Police pulled over a vehicle driven by 26 year old Allyssa Stovall on December 6th. They found a backpack in the car which contained a three quarters of aa pound of meth and a Glock handgun modified with a switch to make it fully automatic. Stovall was charged with Felon in Possession of a Firearm, Unlawful Possession of an Offensive Weapon, Possession of Methamphetamine With Intent to Deliver, and Violation of the Drug Tax Stamp Act.