The four alleged perpetrators who live streamed their torturing of a mentally handicapped man in Chicago pled not guilty Friday to multiple felony charges. The Cook County State Attorney’s Office in Illinois is formally charging 18-year-olds Tesfaye Cooper, Jordan Hill, Brittany Convington and 24-year-old Tanishia Covington with aggravated kidnapping, aggravated battery, aggravated unlawful restraint, and hate…