The Aurora City Council has commissioned a study of the emergency response to the July 20 theater shootings that killed 12 people and left 70 injured.
The $249,000 study was approved Monday.
The goal is to identify what went well and areas for improvement.
Police Chief Dan Oates says it's important to document the response, saying some emergency personnel were "superheroes" that night.
The city delayed the study once at the request of the district attorney, who said it could jeopardize the prosecution of James Holmes, who is charged with murder and attempted murder.
Oates says the prosecution has now progressed far enough that the study won't be a problem.
A judge entered a not guilty plea for Holmes. Prosecutors are seeking the death penalty.