Police shoot and kill man after yelling at him to drop knife

Police shot and killed a 27-year-old Black man on a Philadelphia street Monday afternoon after yelling at him to drop his knife. Officers were called to the Cobbs Creek neighborhood and encountered the man, later identified as Walter Wallace, who was holding a knife, Little said. Hundreds of protestors took to the streets to protest the shooting late Monday into early Tuesday with interactions between protesters and police turning violent at times, the Philadelphia Inquirer reported.