USA TODAY WASHINGTON – The District of Columbia medical examiner on Wednesday released the cause of death for four of the five people who died at the Jan. 6 riot at the U.S. Capitol, but results are still pending for Capitol Police Officer Brian Sicknick. Dr. Francisco Diaz, the district's chief medical examiner, announced the causes of deaths as: • Ashli Babbitt, 35, died by homicide from a gunshot to the left shoulder. She was shot by a Capitol police officer while trying to climb through a door near the House chamber. • Kevin Greeson, 55, died of natural causes from cardiovascular disease. Greeson, of Athens, Alabama, had a Twitter account in which he supported former President Donald Trump and profanely denounced his opponents.