Capitol Police officer Brian Sicknick suffered two strokes and died of natural causes after defending the Capitol during the Jan. 6 riot, Washington, D.C.'s chief medical examiner Francisco Diaz ruled Monday. Diaz said Sicknick's autopsy found no evidence that the officer suffered any internal or external injuries or an allergic reaction to chemical irritants, such as bear spray, which two men are accused of assaulting him with during the riot. The ruling will likely make it difficult for prosecutors to pursue homicide charges in Sicknick's death. Citing privacy laws, Diaz did not divulge whether Sicknick had a pre-existing medical condition that may have contributed to the 42-year-old's death, though he did say "all that transpired" during the highly tense situation at the Capitol "played a role in his condition."

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