I'm probably conflating it with another event from around then if anyone knows anything that would fit?

yeah, you're thinking of this:

https://en.wikipedia.org/wiki/Killings_of_Aaron_Danielson_and_Michael_Reinoehl

On August 29, 2020, Aaron Danielson, an American supporter of the far-right group Patriot Prayer,[1][2] was shot and killed, allegedly by a far-left activist, after participating in a caravan which drove through Portland, Oregon, displaying banners and signs supporting President Donald Trump,[3] and clashing with participants in the local George Floyd protests.[3][4]

On September 3, 2020, Danielson's suspected killer, Michael Reinoehl, an American anti-fascist[3][5] activist[6][7] was shot and killed by a federally led fugitive task force near Lacey, Washington.[8][9]