MCALESTER, OK - Two McAlester residents plead guilty to federal drug charges in an elaborate meth scheme.

The US Attorney's Office tell us 53-year-old Larry Piprich and 32-year-old Shila Parker would travel all over Oklahoma and North Texas buying up all the pseudophedrine they could.

They say the duo bought more than 9 grams of the drug the active ingredient used in making meth over 40 times in a single day.

Formal sentencing is pending both remain in the custody of US Marshals.