WaPo reports on the charges:
“We have the statements of the four of them,” Chicago Area North Detectives Commander Kevin Duffin said at the briefing Thursday afternoon. “They admit that they were beating him, kicking him, they made him drink toilet water, and then obviously the video where they’re cutting a piece of his scalp.”2 of the 4 accused are female. 3 of the 4 are 18 years old, and one — a female — is 24.
Duffin said that hate crime charges were warranted because of the victim’s “diminished mental capacity, the fact that they tied him up, the obvious racial quotes that they post live on Facebook.”
When asked whether the hate crime charges stemmed from the 18-year-old’s mental health or his race — both of which are factors listed in the state’s hate crime statute — Duffin said: “It’s half a dozen of one, six of the other.”
AND: "Facebook on Thursday refused to respond to mounting questions over its apparent failure to take down a live broadcast of the brutal attack of a young man with disabilities in Chicago."