Hippa violation to call Police on patient after they leave ER ?

Hello, I would like to know if it would be a HIPPA violation to call the police anonymously on a patient after they leave the ER ? A friend of a coworker ( NP ) called the police on a patient to say they were given meds by a family member while in the ER waiting area. They called the police is hopes of getting even with the patient since they asked for another doctor . The police called the patients doctor to report family sharing of medication. She tried to jeopardize the healthcare of the a patient just to be mean even though she knew her claim was false.