Oh hey look. A CNN article talks about it. I don't pay attention to CNN, but let's take a look.
*reads.*
Ah.
*looks up followup story*
Mhmm.
So the perp responsible was charged and jailed. Case closed.
Oh wait, you're trying to say that this was a leftist/blm/democrat attack?
Dorn's widow, Ann Dorn, spoke in favor of Donald Trump at the 2020 Republican National Convention with David's two sons Brian and Kielen Powell at her side.
The officer's daughters, Debra White and Lisa Dorn, called Ann Dorn and asked her not to speak about their father at the convention and told the St. Louis American that their father was a registered Democrat and didn't support Trump. "She can be a Trump supporter in her own right, but she should not politicize our father's death for Trump's agenda. He thought Trump is doing many things to ruin our country," Lisa Dorn told the paper. Debra White told the paper that her father opposed much of Trump's rhetoric and policies, including "the things he said about Colin Kaepernick, the kids locked up in cages, the racist remarks." Dorn's daughters stated their father did not want to support the "law and order agenda"
I don't see anywhere about the political alignment of Stephen Cannon, the shooter. That being said...
https://apnews.com/article/32bc90566697388645f01675359dcad1
A good read. It's got some juicy stuff in there, like ANTIFA and other such stuff.