MINNEAPOLIS (AP) — A registered nurse has pleaded guilty to stealing painkillers meant for patients at a Twin Cities hospital.

The U.S. Attorney’s office says 31-year-old Maria Anne Mihalik of Superior, Wis., pleaded guilty Wednesday to one count of obtaining a controlled substance by fraud.

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Prosecutors accused Mihalik of entering patients’ rooms at Mercy Hospital in Coon Rapids last May and taking the painkiller Dilaudid.

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Mihalik didn’t work at the hospital, but police say she was wearing scrubs and an ID badge in an attempt to blend in with other hospital workers.

She faces a potential maximum penalty of four years in prison. A sentencing date has not been set.

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