President Barack Obama says the torture of a mentally disabled man in Chicago, streamed on Facebook Live, is despicable hate crime.
The President said that while he did not believe US race relations had worsened, public exposure to race crimes had grown in the digital age.
He said the video summarized problems that have existed for some time.
Three teenagers and a woman, are due in court today accused of aggravated battery with a weapon.
Jordan Hill, Brittany Covington and Tesfaye Cooper, all 18, and Tanishia Covington are also accused of aggravated unlawful restraint.