(CNN) A woman has pleaded guilty to negligent homicide after performing a cosmetic surgery that killed a 34-year-old Maryland woman, attorneys say.

Donna Francis, who is not a licensed nurse or physician, was performing a buttocks enhancement procedure on the woman in May 2015, when the victim went into cardiac arrest, a statement from John M. Ryan, acting district attorney for Queens County in New York, said.

Francis, 39, operated from the basement of a Queens home, used a massage table as an exam table and bought silicone gel from eBay, the district attorney's statement says.

The victim had traveled to New York with her mother and paid $1,600 for the injections. But as Francis pumped the fluid into her body, the victim went into cardiac arrest, the statement says.

"The medical examiner determined the woman's cause of death was systemic silicone (embolism)," prosecutors said. "Silicone, when injected into a human body, must be encapsulated to avoid free silicone from entering the bloodstream and causing an embolism."

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