Chicago police arrested four people after they bound and gagged a mentally disabled teen, 18, and broadcast the gruesome clip on Facebook Live. The disturbing 30-minute video shows the teen bound and gagged, while his attackers shouted "f*ck Donald Trump" and "f*ck white people." The video also shows one of the suspects cutting into the teen's scalp, leaving a visibly bald patch. The video, which was uploaded at 2 p.m. local time, was shared 62,000 thousand times on Facebook on Wednesday before it was removed.