NASHVILLE, Tenn. (AP) — Federal prosecutors say a Cookeville man has admitted to making fake Tennessee driver licenses so he could purchase cold medicines used to make meth.

The office of U.S. Attorney David Rivera announced that 41-year-old Richard Earl Graybeal pleaded guilty in a federal courtroom in Nashville to producing false identification documents. Tennessee law requires that a driver's license be produced when buying cold and allergy medicine used to make meth because the law limits the sale of the medicines.

Graybeal was already on probation for promoting the manufacture of methamphetamine. Authorities said police found more than 70 fake driver licenses at his residence, along with materials used to make fake IDs.

Graybeal will be sentenced in August. He faces up to 20 years in prison.