Cameron Douglas was arrested last month at a Manhattan hotel on charges he trafficked large quantities of methamphetamine. He was put under house arrest at his mother's apartment.
Federal investigators claim that on Monday the 30-year-old Douglas' girlfriend, Kelly Sott, delivered an electric toothbrush to the home. They later discovered 19 containers of heroin inside of it.
Sott was later arrested at the same hotel where the son of the Oscar-winning actor was nabbed, and both were put behind bars at a federal jail. Their attorneys declined comment on Thursday.