Initial trials of the drug focused on severely ill patients.
More than 250 protests across the country have erupted in response to the killing of George Floyd in Minnesota last week.
Many of America's major cities remain under curfew orders as National Guard forces watch and patrol.
Louisville authorities did not specify who fired the fatal shot, and authorities have not released information about the victim
The video lines up with the criminal complaint filed against officer Chauvin, detailing what happened at 8:18 p.m. when the video is timestamped.