The Sun-Times reported that officers hit at least one man with a baton, while some protesters punched back and others threw glass bottles at officers. A confrontation then ensued and the man was shot, Guglielmi said.
Chicago police patrol chief Fred Waller told U.S. media that officers saw a bulge in the victim's pants that they thought was a gun. No officers were hurt, and a weapon was recovered at the scene along with several magazines of ammunition, according to Guglielmi.
Truitt was arrested about 10 p.m. Friday after officers identified him as the man who allegedly shot toward them while running from the traffic stop, police said.
The Chicago Sun-Times says scuffles broke out between protesters and police officers holding batons who had cordoned off the area.
Speaking to Al Jazeera, Issa said that the tension was so high immediately after the shooting that "it was clear there was going to be a confrontation between Chicago Police and protesters at some point".
Police spokesman Anthony Guglielmi later tweeted that police had cleared the scene and four demonstrators had been arrested.
Chicago police fatally shot a neighborhood barber Saturday evening, igniting a protest near the scene in the city's South Shore neighborhood, officials said. No officers were hurt, police said.
As protesters gathered earlier, one protester used a megaphone to yell out the names of other people who had been fatally shot by Chicago police, including 17-year-old Laquan McDonald.
Randale Truitt, 31, of the 200 Block of E. 70th Street in the South Side's Park Manor neighborhood, is charged with two felony counts of attempted first-degree murder and was served three warrants, police said in a news release Sunday morning.
McDonald's death led to the ouster of the police chief and a series of reforms created to prevent future police abuses and to hold officers accountable.
These disparities, particularly the killing of African Americans by police, has prompted the rise of the Black Lives Matter movement, a popular civil rights movement aimed at ending police violence and dismantling structural racism.