I can appreciate where you're coming from. Lies and liars piss me off, too. But it's simply a fact that Sicknick was not struck by a fire extinguisher. That claim was published repeatedly by many mainstream outlets (who happily spread all manner of lies in the immediate aftermath of Jan 6) based on "anonymous sources", but yhere is zero evidence that it happened.

[0]https://www.snopes.com/fact-check/brian-sicknick-fire-exting...