Federal officials arrested and charged two men last month with assaulting Sicknick

U.S. Capitol Police officer Brian Sicknick suffered two strokes and died of natural causes the day after he confronted rioters during the Jan. 6 insurrection, according to Washington's top medical examiner.

The chief medical examiner, Francisco Diaz, said Monday that an autopsy of Sicknick found no evidence the 42-year-old suffered an allergic reaction to chemical irritants. Diaz ruled the Sicknick, 42, died from "acute brainstem and cerebellar infarcts due to acute basilar artery thrombosis."

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There were also no signs of internal or external injuries, according to The Washington Post, which first reported the news

The medical examiner's report showed that Sicknick was sprayed with a chemical substance around 2:20 p.m. on Jan. 6 and collapsed at the Capitol around 10 p.m. that evening. He died around 9:30 p.m. on Jan. 7, the report said.

Federal officials arrested and charged two men last month with assaulting Sicknick with bear spray during the riot. They each faced an array of charges, including assaulting a federal officer with a dangerous weapon and conspiracy, although authorities stopped short of charging them with his death. Read more at FOX News