A medical examiner's office concluded that natural causes triggered the death of Brian Sicknick, one of the victims of the Capitol Insurrection that happened on January 6, 2021. The ruling was made by the medical examiner's office from Washington, D.C. on Monday, Associated Press reported.

Officer Brian Sicknick is one of the law enforcement officers who defended the Capitol when the rioters stormed inside the building while Congress is voting to certify President Joe Biden's electoral winning. Although the cause of Sicknick's death was not determined until Monday, investigators initially theorized that the cop's cause of death was when he was hit with a fire extinguisher in the head.

Medical Examiner on Brian Sicknick's Death

The medical examiner's office noted that Brian Sicknick suffered from a stroke that leads to his death the day after the rioters came into the Capitol, Reuters reported.

Francisco Dias, the Chief Medical Examiner pointed out in an interview that the entire incident of Sicknick confronting the rioters "played a role" in the condition he suffered, CNBC reported.

Diaz's office pointed out that the official cause of Brian Sicknick's death was "acute brainstem and cerebral infarcts due to acute basilar artery thrombosis."

Meanwhile, the United States Capitol Police noted that they have accepted the medical findings of the Chief Medical Examiner. However, Capitol Police reiterated that the ruling will not change the fact that their officer had died in the line of duty as he courageously defended Congress and the Capitol.

"The attack on our officers, including Brian, was an attack on our democracy," the Capitol Police highlighted in their statement.

Drawbacks Caused by the Medical Examiner's Findings

Despite the findings of Brian Sicknick's cause of death, the Associated Press noted that the determination of natural causes as the doorway to the officer's death will make it challenging for the federal prosecutors to pin murder charges on the case.

However, the ruling will serve as the determining factor whether a homicide charge can be brought to the case of the two men who were taken into custody after spraying a chemical irritant against the officers. The two men were identified as Julian Khater and George Tanios.

The lawyers of the two suspects spraying the chemical on officers did not give an immediate comment on Monday after the ruling of the medical examiner's office was released.

Federal prosecutor Michael Sherwin noted that the imagined murder charges would be brought if the medical examiner ruled that the chemical spray played a role in the officer's death.

Brian Sicknick became the fifth person in history to be buried in the Capitol Rotunda. The area was designated as the burial site of those who are not elected as officials, judges, or military leaders.

Having natural causes, the medical examiner's findings as Brian Sicknick's cause of death, the United States Capitol Police noted that they are working with the U.S. Attorney's Office District of Columbia, Metropolitan Police Department, F.B.I.'s Washington Field Office in ensuring that the people responsible for the assault of their officers be held accountable.

WATCH: Capitol Police Officer Brian Sicknick died of natural causes, medical examiner says - from CBS Eveneing News