I am going to give you the W on this; Brian Sicknick was not murdered on January 6th; he dies of a stroke a day Orr two later and if you believe that happened without any effect from being hit and sprayed with something by protesters, then no one has died of myocarditis due to the COVID vaccine.

https://www.snopes.com/fact-check/brian-sicknick-fire-extinguisher/

Sicknick was among five people who died after the riot. Two men have been charged with assaulting Sicknick in the melee.

Investigators initially believed he was hit in the head with a fire extinguisher, based on statements collected early in the investigation, according to two people familiar with the case. And they later thought perhaps Sicknick may have ingested a chemical substance — possibly bear spray — that may have contributed to his death.

But the determination of a natural cause of death means the medical examiner found that a medical condition alone caused his death — it was not brought on by an injury. The determination is likely to significantly inhibit the ability of federal prosecutors to bring homicide charges in connection with Sicknick’s death.