The eight people, who range in age from 14 to 35 years old, were standing in a courtyard about 12:40 a.m.in the 1300 block of West 76th Street when several males approached and opened fire, according to Chicago police.
Nevertheless, Chicago's official murder count, at 310 killings before the weekend, was the highest in the country and far eclipsed those of America's two largest cities - NY and Los Angeles.
By comparison, at least seven people were killed and 32 were wounded during the long Memorial Day weekend, which is often one of the most violent weekends of the year for the city, the Chicago Tribune reported.
Asked why, if the good outweigh the bad, members of the community are not stepping up to help identify shooters, Johnson said: "That's a question we've been asking for quite some time, so, listen, that's something they have to do better at".
Gang members are using large summer crowds as cover in some cases, police Patrol Chief Fred Waller said.
The former New York City mayor also tweeted his support for Chicago's former superintendent, Garry McCarthy, referring to him as "Jerry" and calling him a "policing genius".
Even a music festival turned deadly during Chicago's dark weekend.
Image Police admitted they were 'behind the eight-ball'
The mayor had no immediate comment on Giuliani's attacks. "It's the same people pulling the triggers". "This is a small subset of individuals who think they can play by their own rules because they continue to get a slap on the wrist when we arrest them".
More than 1,600 people have been shot in the city this year, including three children who were recently wounded while playing basketball.
The violence reached a peak early Sunday, when 30 people were shot during a three-hour span between midnight and 3 a.m.
There were six shootings in the city on Friday evening, though none were fatal, and a further 15 people were shot on Saturday, one of whom died.
Chicago saw fewer homicides in 2016 than in 2017; 650 and 771 respectively. Though the drop was significant, last year's total exceeded the combined number of killings in NY and Los Angeles, the two US cities bigger than Chicago.
"I know that in America, we go out in the global community and we help some of the communities that are the most violent", said Ford.
"Let me be clear: I am a proud Democrat and I do not agree with Mayor Guiliani's political views and I certainly remain opposed to the misguided, divisive tone and policies of Donald Trump".
McCarthy said the blame for the bloodshed "lies squarely with Rahm Emanuel's weak leadership and failed policies", not with Chicago Democrats as a whole.