"They send an Assistant State Attorney out to the scene to work with the homicide unit, to make sure all things are being done, God forbid there be a prosecution," says Scott.
Scott say in a case like this, the deputy may come back from administrative leave to do "light duty" work inside the department. But the deputy doesn't go back on patrol until, or unless, he's cleared in the shooting probe.
In the meantime, he is offered counseling.
"It's a very daunting event, I don't care how tough an officer thinks they are. When you use deadly force it's a traumatic event, psychologically and emotionally," says Scott.
Read more: Officer involved shooting investigation - what's next?