Graphic footage captured on Facebook Live shows a mentally handicapped white man being tortured in Chicago by African-American assailants as they laugh and express their disgust for white people and President-elect Donald Trump.

Chicago police announced on Wednesday evening that they had arrested four people in connection with the crime, according to Fox 32.

The video, taken by a woman identified on Facebook as “Brittany Herring,” shows a white man tied up with tape across his mouth. The victim is shown being repeatedly hit, sliced at with a knife, berated and his clothes ripped off.

WARNING: GRAPHIC

At one point in the video, the primary assailant shouts at the bound man, “Fuck Donald Trump, nigga! Fuck white people, boy! Fuck white people, boy!” while he kicks him. At another point in the video, the perpetrators laugh about being reported to the police in response to a Facebook commenter claiming they’re going to be arrested. They also mock another commenter who said their torture was not funny — by claiming it is funny.

More videos emerged later on Wednesday of the crime. In one, the suspects threaten their victim with a knife and beat him before he was tied up. The victim can be heard screaming and pleaded with his attackers to stop. It ends with one of the attackers saying he’s going to “shank” the white male.

MORE VIDEO FOUND Blacks kidnap and torture white Trump supporter. pic.twitter.com/aNrQuULeRk — James J. Vinson (NT) (@JamesJVinson) January 5, 2017

In another video, the suspects force the victim to drink toilet water straight from the commode.

Chicago police said they were considering hate crime charges in the case and called the crime “sickening” in a Wednesday night press conference. They confirmed the victim is mentally handicapped and was released from the hospital after being treated for his injuries.

Police say he has been “extremely traumatized” by the crime.

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