Image: Chicago police are questioning persons of interest after a Facebook Live video surfaced showing a group of people beating and cutting a man

Image: Chicago police are questioning persons of interest after a Facebook Live video surfaced showing a group of people beating and cutting a man

Four teens were being held by Chicago police Wednesday after a shocking Facebook Live video showed what appeared to be the beating and torturing of a bound and gagged fellow teenager with mental health challenges while they yelled anti-white expletives.

Officials said they expect to file charges against the four 18-year-olds, two men and two women, within the next 24 hours.

Chicago Police Supt. Eddie Johnson called the video a “brutal act” that was “broadcast for the entire world to see.”

“It’s sickening,” Johnson said at a news conference Wednesday night. “It makes you wonder what would make individuals treat somebody like that. I’ve been a cop for 28 years and seen things that you shouldn’t see in a lifetime, but it still amazes me that you see things that you shouldn’t.”

The video, first aired Tuesday and then put up on YouTube, showed four young people kicking, slapping and cutting a someone who is tied up on the floor in the corner of a room. The people could be heard yelling “F— Donald Trump!” and “F— white people!” at various points throughout the 30 minute video.

One of the four suspects allegedly recorded the brazen incident and allowed people watch it in real time on her Facebook page.

The assailants in the video can be heard laughing, discussing drug use and putting the victim “out of his misery” and cursing the president-elect, while the bound victim moans through his gag.

A local police on patrol later found the victim disoriented while walking through a Chicago neighborhood, Johnson said. He was taken to a nearby hospital for his injuries and trauma.

“Thanks to the outstanding work of the 11th district police officers and area north detectives all four offenders from the incident are in police custody and awaiting formal charges,” Johnson said. “The victim, who is not a Chicago resident, is currently recovering from the incident.”

The four suspects had been arrested on unrelated battery charges later in the day, he said.

Investigators were then able to connect the two incidents through the Facebook Live video.

It took police most of the night to get the full story from the victim because he had such a difficult time communicating due to trauma, Chicago Police Commander Kevin Duffin said. The young man was eventually able to explain what happened and has been released from the hospital.

“He was traumatized fairly good,” Duffin said. “It took most of the night for him to calm down and talk to us.”

The victim, who was reported missing from a Chicago suburb, apparently knew one of the four teenagers and went with them willingly from his home, police said. He was with the group for at least 24 hours, if not longer, they said.

Police are investigating the case as a potential kidnapping and hate crime — the assailants in the video are black and called the victim a “goof-ass white man.”

“We’re still investigating it and if the facts guide us in that [hate-crime] direction then we’ll certainly charge them appropriately,” Johnson said.