One of three conditions must be true:
And since she had a hospital management person on the phone, no Charge Nurse need be involved.
The nurse arrested was the charge nurse on duty according to this article:
“Wubbels was working her shift as a charge nurse, or a liaison between patients and doctors and hospital managers, at University Hospital’s Burn Unit when she was handcuffed in the middle of her work area, pulled outside and put into a police patrol car for about 20 minutes.”
http://www.ketv.com/article/this-is-crazy-nurse-arrested-for-doing-her-job/12156948