Mo. teen already facing state weapons charges now faces federal counts as well

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KANSAS CITY, Mo. -- A 19-year-old from Tarkio, Mo., accused of bringing a gun to school is now facing federal charges. Federal prosecutors charged Michael Knoth with two counts of possessing illegal firearms on Wednesday.

Authorities say that Knoth had a gun and a lot of ammunition in his backpack, and wore tactical gear to Tarkio High School on February 11. Knoth was charged with two felonies in Atchison County for those allegations, to which he pleaded not guilty to on February 18.

According to new court documents, a search of his home revealed what authorities call two illegal machine guns. An affidavit says that investigators found receipts in his bedroom for firearm parts which included a M16 LPK part kit with an auto sear.

An auto sear is a device used to transform a semi-automatic rifle to a fully automatic rifle, according to the court document. Investigators also say they found an AR-style .223/.556 caliber pistol without a visible serial number or manufacturer's stamp in Knoth's closet, as well as an UZI-styled 9 mm firearm in his dresser.

Special agents with the Bureau of Alcohol, Tobacco and Firearms field tested the AR-style and UZI-style firearms, both of which displayed traits of a machine gun according to the affidavit.