The owner of a South Shore spa linked to more than a dozen cases of botulism has pleaded guilty in federal court to performing illegal injections using unapproved Botox.
Rodrigo de Medeiros Siqueira, 33, of Quincy, the owner of Rodrigo Beauty Inc. in Milton, pleaded guilty to one count of misbranding of a drug after shipment in interstate commerce with the intent to defraud or mislead, U.S. Attorney Leah Foley said in a statement on Friday.
U.S. District Court Judge Richard Stearns scheduled sentencing for Aug. 12…