The wikipedia article you linked to only has one death, and it was an uninvolved person. In the 2015 Oklahoma swatting incident, the swatting victim shot the police chief, then surrendered. The cop survived and the swatting victim was not charged.[1] My guess is that the police really screwed up and didn't announce themselves before busting down his door.

1. https://www.msnbc.com/msnbc/no-charges-man-who-shot-police-c...