An officer uses deadly force and shoots a suspect.

So what do they do now?

Scott Willadsen, the use of force coordinator at the Department of Public Safety Standards and Training police academy, explains what he teaches new officers.

"Every shooting is different," Willadsen said. "Am I in a gunfight or did I shoot somebody with a knife? If I'm in a gunfight, I might have been shot or injured also, and so we teach them to prioritize medical care. Do I need to treat myself? Do I need to treat them? Is it safe to treat them?"

Medical care, he said, almost always is first. Then officers are taught to get the information out on the radio: "Shots fired. Suspect is down. I'm OK. Send medical. Send a supervisor."

After that, it depends on totality of the circumstances, such as whether or not it’s appropriate for an officer to handcuff the suspect, then remove dangerous weapons from the scene, and keep everyone safe until the investigation team responds.