TOPSHOT - An activist follows the Drerek Chauvin trial on her phone in front of the Hennepin County Government Center in Minneapolis, Minnesota, on March 30, 2021. - The teenager who took the viral video of George Floyd's death told the trial on March 30 of the white police officer charged with killing the 46-year-old Black man that she regrets not being able to save his life. Darnella Frazier, 18, was among the witnesses who provided emotional testimony on Tuesday at the high-profile trial of former Minneapolis police officer Derek Chauvin. (Photo by Kerem Yucel / AFP)