A year after George Floyd's death, America is still grappling with police violence and reform

A year after George Floyd's death, America is still grappling with deadly policing incidents.

At 23, Afeni Evans had just gotten out of the Army and was studying political science at a community college in Maryland. Her goal was to someday help craft policy from inside the government. But on Tuesday, Evans will mark one year since her "entire life definitely changed" -- the day that George Floyd was murdered by former Minneapolis police officer Derek Chauvin in an incident that was caught on video in excruciating detail. Within hours, Floyd's name spread from the corner of Chicago Avenue and East 38th Street, where witness Darnella Frazier, a high school student, made a 10-minute cellphone video capturing the 46-year-old begging Chauvin and two other officers helping to hold him down for his life. Watch "After Floyd: The Year that Shook the World -- A Soul of a Nation Special" Tuesday, May 25, at 10 p.m. ET on ABC.