(CNN)Minneapolis Police Chief Medaria Arradondo says the death of George Floyd was "murder" and that the officer who was seen pressing his knee into Floyd's neck "knew what he was doing" because he had taken specific training on preventing "positional asphyxiation," or suffocation.

Hong Kong (CNN Business)Facebook is donating $10 million to groups fighting racial inequality as mass protests sweep across the United States after an unarmed black man died at the hands of a police officer in Minneapolis, Minnesota. "We stand with the black community," CEO Mark Zuckerberg wrote in a Facebook post late Sunday, adding the Silicon Valley tech firm to a growing list of companies that have responded to the protests with condemnations of racism, calls for solutions to the escalating discord in the country and promises to address diversity and inclusion at their businesses.