NEWARK, NJ (CBSNewYork) — A New Jersey woman accused of giving a man a deadly injection of silicone in his penis has pleaded not guilty.

Authorities have charged 34-year-old Kasia Rivera of East Orange with reckless manslaughter and unauthorized practice of medicine.

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Prosecutors say 22-year-old Justin Street had gone to Rivera for the injections to get his penis enlarged.

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He died the next day. The medical examiner ruled the cause of death was silicone embolism.

Rivera is being held on $75,000 bail.

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Investigators are trying to determine if Rivera gave similar injections to other people.