CHICAGO (CNN) -- A young woman who broadcast the beating and racial taunting of a man on Facebook Live has been arrested with three others in connection with the gruesome attack, Chicago police said Wednesday.
The disturbing 30-minute video shows a man tied up and his mouth covered, cowering in the corner of a room. His attackers laugh and shout "f*ck Donald Trump" and "f*ck white people" as they kick and punch him.
The video shows someone cutting into his scalp with a knife, leaving a visibly bald patch.
Police said the victim is an 18-year-old man with special needs. Officers found the disoriented young man wandering a Chicago street "in crisis" Tuesday afternoon.
He was so traumatized that it took most of the night for him to calm down so he was able to talk to police, Capt. Steven Sesso said.
The suspects, two men and two women, all 18, are in custody awaiting formal charges, which are expected to be filed Thursday.
Hate crime charges under consideration
The victim knew at least one of his accused attackers from school, Cmdr. Kevin Duffin said. Though he may have voluntarily gotten into a van with the group, police are considering kidnapping charges.
Because the victim is white and the people in the video are black, police also are investigating whether hate crime charges are appropriate, Duffin said.
"Although they are adults, they're 18. Kids make stupid decisions -- I shouldn't call them kids; they're legally adults, but they're young adults, and they make stupid decisions," Duffin said.
"That certainly will be part of whether or not ... we seek a hate crime, to determine whether or not this is sincere or just stupid ranting and raving."
The victim was taken to the hospital and is in stable condition. Police wouldn't specify the nature of his injuries, but said he is so traumatized that "it took most of the night for him to calm down enough to talk" to detectives.
Police say the victim and those being questioned attended the same school. Three of the four suspects are Chicago residents, and the victim is from a Chicago suburb, according to Chicago Police Dept. Commander Kevin Duffin. The fourth suspect is from Carpentersville, Illinois.
There doesn't appear to be any drug connection, and the victim is believed to have initially gone voluntarily with one of the suspects after they met in the suburbs, Duffin said.
Police also say the suspects stole a van in the suburbs and transported the victim into the city.
Chicago police said they are still investigating the events that preceded the Facebook Live video.