Corey Hardiman, who is running in the 9th Ward, said even rival gang members were united in Missouri.
The South Side pastor said Antonio Smith's killer is a "terrorist."
Instead of buying 150 guns at a Saturday event, St. Sabina Church will be able to buy up to 180 guns.
The Aug. 16 gun buyback is for only for the first 150 people between 16 and 30 years old.
A group of community activists said if the city improves public schools that would help reduce crime.
Mayor Rahm Emanuel met with 50 Bronzeville leaders Monday.
St. Sabina is hosting a block party in Auburn Gresham instead of its weekly peace march.
Thousands of kids in the program will take part in rallies Wednesday across the city.
St. Sabina Church will hold the march after Chicago Public Schools students finish Friday.
Before she was a renowned poet, Angelou sang at the Gate of Horn on Dearborn Street.
Glenda Franklin, 50, a member of St. Sabina Church, has received his support.
Wearing ninja-like suits, the priest's attackers allegedly hit him with a cane and holy water sprinkler.
Mayor Rahm Emanuel called on all media, artists, entertainers and athletes to join the effort.
Mayor Emanuel and parents of children killed in gun violence joined Pfleger at an anti-violence rally.
Residents said the Nation of Islam-run eatery has been closed for two months.
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