WASHINGTON - The D.C. medical examiner’s office has released its findings regarding the cause of death of Capitol police officer Brian Sicknick.READ MORE: Capitol rioters’ causes of death releasedAccording to the medical examiner’s office, Sicknick’s death was "natural."Officially, the cause of death was "acute brainstem and cerebellar infarcts due to acute basilar artery thrombosis."Download the FOX 5 DC News App for Local Breaking News and WeatherThey say the Sicknick was sprayed with a chemical outside the Capitol around 2:20 p.m.