The trial of former Minneapolis police officer Derek Chauvin continues on April 5 with key witness testimony. Chauvin, who was filmed with his knee on George Floyd’s neck in May, faces murder and manslaughter charges for the encounter that sparked months of historic protests around the world. This stream contains graphic content. Lt. Richard Zimmerman, the most senior officer in the Minneapolis Police Department, testified earlier that Chauvin’s use of force against George Floyd was “uncalled for” and “totally unnecessary.” Zimmerman said that once someone is handcuffed, “they are not a threat to you at that point” and the amount of force should be immediately reduced. “If your knee is on a person’s neck, that could kill him,” he testified. Eric Nelson, Chauvin’s attorney argued that police can use “improvisation” for “whatever force is reasonable and necessary. The Post’s Rhonda Colvin will anchor live coverage featuring reporters Mary Beth Albright, Holly Bailey, Abigail Hauslohner, Hannah Jewell, Steven Rich, and Eugene Scott. Plus, columnist James Hohmann. Read more: https://wapo.st/2PACddR. Subscribe to The Washington Post on YouTube: https://wapo.st/2QOdcqK Follow us: Twitter: https://twitter.com/washingtonpost Instagram: https://www.instagram.com/washingtonpost/ Facebook: https://www.facebook.com/washingtonpost/