A 45-year-old Atlanta woman admitted in federal court March 29 that she illegally injected women with industrial-grade silicone in an effort to enhance the shape of their buttocks.

Kimberly D. Smedley pleaded guilty in the U.S. District Court in Baltimore to charges that she conspired to introduce and deliver into interstate commerce an adulterated and misbranded device.

“Kimberly Smedley endangered her customers’ lives by injecting them with commercial silicone, causing at least one victim to suffer lung damage from a substance not approved by the Food and Drug Administration,” said U.S. Attorney Rod J. Rosenstein in a statement. “No one should undergo medical procedures in a hotel room.”

According to the plea agreement, for a period of about eight years, Smedley was paid $500-$1,600 per person to inject the illegal substance into women. Over the course of the eight years, authorities estimate that she made over $200,000 in cash.

The plea agreement also says that Smedley misrepresented the kind of silicone she was using for the injections. The women whom she injected believed they were receiving medical grade silicone, but the silicone Smedley used, 100 centistoke dimethyl siloxane fluid, is used for metal or plastic lubrication, an additive for paint and coatings, and for furniture or vehicle polishes.

Her scheme unraveled after she injected her chemical mixture in a Baltimore-based exotic dancer, who immediately felt ill. The woman had to make two trips to the hospital and on the second visit; silicone was found on the sides and bottom of her lungs. The woman remained in the hospital for four days before being discharged.

Smedley faces up to five years in prison and a $250,000 fine. Her sentencing is scheduled for July 12.