Rebecca Auborn, a 33-year-old from Columbus, Ohio, pleaded not guilty to murder charges on Monday, linked to the deaths of four men. Authorities accuse Auborn of administering lethal doses of fentanyl to these individuals with the intention of robbery. Accompanied by her attorney, Mark Hunt, Auborn maintained her innocence in court. The investigation is active, with the possibility of more victims. Previously, Auborn had entered a not-guilty plea for murder and drug-related charges concerning one of the deaths. She remains in custody without bond.