SALT LAKE CITY -- Officials at a Utah hospital where a nurse was arrested after refusing to allow police to draw an unconscious patient's blood are apologizing that security officers didn't intervene and saying they've implemented policy changes.

The announcements Monday mark the latest fallout from nurse Alex Wubbels' release last week of the July 26 body-camera footage showing a Salt Lake City police officer dragging her from University of Utah Hospital.

The footage has resulted in a public apology from the city's police chief and a criminal investigation by the district attorney's office, CBS News correspondent Tony Dokoupil reports. Two officers are on paid administrative leave.

The Salt Lake City police chief has said he was "alarmed" by what he saw on the video.

But Monday's mea culpa from University of Utah Police Chief Dale Brophy marked his first public comments on the reaction by his officers at the hospital. Wubbels has previously said she was very upset that none of the University of Utah officers came to her rescue and just stood by and watched it happen.

Brophy said he didn't fully understand the scope of the incident until the bodycam video was made available to him by the Salt Lake City police department.

"It was clear the arrest was completely mishandled and inappropriate and didn't need to happen," Brophy said.

Brophy says none of the hospital officers have been disciplined but will receive additional training.