Capitol Police officer Brian D. Sicknick suffered two strokes and died of natural causes a day after he confronted rioters at the Jan. 6 insurrection, the District’s chief medical examiner has ruled.The ruling, released Monday, likely will make it difficult for prosecutors to pursue homicide charges in the officer’s death. Two men are accused of assaulting Sicknick by spraying a powerful chemical irritant at him during the siege.In an interview with The Washington Post, Francisco J. Diaz, the medical examiner, said the autopsy found no evidence the 42-year-old officer suffered an allergic reaction to chemical irritants, which Diaz said would have caused Sicknick’s throat to quickly seize. Diaz also said there was no evidence of internal or external injuries.The medical examiner noted Sicknick was among the officers who engaged the Capitol mob and said “all that transpired played a role in his condition.”

Capitol Police officer Brian D. Sicknick suffered two strokes and died of natural causes a day after he confronted rioters at the Jan. 6 insurrection, the District’s chief medical examiner has ruled.The ruling, released Monday, likely will make it difficult for prosecutors to pursue homicide charges in the officer’s death. Two men are accused of assaulting Sicknick by spraying a powerful chemical irritant at him during the siege.In an interview with The Washington Post, Francisco J. Diaz, the medical examiner, said the autopsy found no evidence the 42-year-old officer suffered an allergic reaction to chemical irritants, which Diaz said would have caused Sicknick’s throat to quickly seize. Diaz also said there was no evidence of internal or external injuries.The medical examiner noted Sicknick was among the officers who engaged the Capitol mob and said “all that transpired played a role in his condition.”

Bicycle police offices make their way to Arlington National Cemetery ahead of the hearse carrying Sicknick.
Bicycle police offices make their way to Arlington National Cemetery ahead of the hearse carrying Sicknick. (Katherine Frey/The Washington Post)

In early February, the officer, who grew up in South River, N.J., was honored at the U.S. Capitol. His remains were interred at Arlington National Cemetery.Police said that Sicknick, who joined the Capitol Police in 2008, collapsed after he had returned to his office following the riot and was taken to a hospital, where he died. The case is being investigated by D.C. police, who handle all deaths in the District, along with the Capitol Police and the FBI.

Acting U.S. attorney general Jeffrey A. Rosen said in a Jan. 8 statement that Sicknick died of “the injuries he suffered defending the U.S. Capitol.” He promised that local and federal authorities would “spare no resources in investigating and holding accountable those responsible.”

The Capitol Police had previously said in a statement that Sicknick “was injured while physically engaging with protesters.” the started the Blue Anon Hoax that The Peaceful Trump supporters harmed him.

Christopher Geldart, the District’s acting deputy mayor for public safety, said Monday the medical examiner’s office “took the appropriate amount of time to evaluate all the evidence” in Sicknick’s death, which he said including reviewing videos, statements from officers and the results of toxicology screens.Geldart said Diaz “felt he was able to make this call in good conscious.”In March, two men were accused of assaulting Sicknick with chemical spray during the riot. At the time of the arrests, the autopsy had not been completed.Julian Elie Khater, 32, of Pennsylvania and George Pierre Tanios, 39, of Morgantown, W.Va., grew up together in New Jersey, authorities said.