It was a defensive shooting - nothing more unless somebody comes up with information that the bad guys also fired. The distinction between a shooting has been made clear to me by several firearms instructors such as Ken Hackathorn.
He continued by reminding us that there are two times when a firearm is used in the real world: Shootings and Gunfights.
"They aren't the same," our mentor explained. "In a Shooting only one person fires a gun and the average round count is one to three shots. However, a Gunfight involves multiple parties all firing guns and the average number of shots fired is whatever happens to be in the gun."