There was a situation in a Bountiful hospital (just north of Salt Lake City) that started similarly, but ended very differently.
Two North Salt Lake PD officers brought in a psych case, and completed the paperwork to turn the patient over to the hospital. Then they decided that they wanted a blood sample. The nurse told them that was not allowed, and the NSLPD officers became loud and unprofessional.
The difference was that the security guy on duty immediately interposed himself between the officers and the nurse. He explained to the officers that if they kept it up, they were going to jail. Then he kicked them out of the ER, and he made it stick.
Of course, this particular security officer is very protective of the hospital staff. He's the one who walks nurses to their car when there is a shift change at night.
