Terribly sad situation all around. His best friend (Let's call the friend "X" for now) is close friends with the guy I fished with this past weekend and close friends with one of my groomsmen. I also did the taxidermy work on X's first duck. X is also a deputy and showed up a minute or two after the first shots were fired and I think he ended up in the firefight.
The guy who killed the officer (and was killed at the scene) was schizophrenic and bipolar and started having an episode that night. He freaked out and locked himself in a bedroom with the kids. Wife called the police for help. When he heard the officers' radio coming up the stairs he started shooting through the walls and struck him. It was unexpected. Of course then there was a firefight with children in the bedroom, who undoubtably had to watch their dad get killed too. [This is my understanding of the events secondhand from the officer I know who lost his best friend]
It really is sobering and tragic.
(On another note-
@InVOLuntary your daughter might know the guy I fished with Saturday who has the YouTube channel)