Police Supt. Garry McCarthy faced grilling from aldermen on crime statistics.
Deonta Noble, 20, was identified as a shooter via his Facebook page, prosecutors said.
Overall crime from Jan. 1-June 30 also decreased for the third straight year, down 15 percent from 2013.
U.S. Rep. Robin Kelly prepared what she called the "blueprint for ending the crisis" of gun violence.
A judge initially had pity for Andrew Ruiz, but lost it after his trial for Manny Roman's brutal murder.
Wrongfully convicted and then released 32 years later, Andre Davis is back in a cell on murder charges.
"We're just hanging in there," said Nathaniel Pendleton on what would have been Hadiya's 17th birthday.
The Logan Square man killed another sister in a drunken rage.
Mayor Rahm Emanuel called on all media, artists, entertainers and athletes to join the effort.
Mayor Rahm Emanuel erupted in anger over the Easter weekend's "senseless, meaningless violence."
Mayor Rahm Emanuel admitted that, at first, "we didn't really have a comprehensive anti-gang strategy."
Mayor Rahm Emanuel stressed "quality of life" issues instead at a Police Department media event.
Rahm and McCarthy touted the study's findings to renew calls for after-school programs and gun control.
"These officers are right here, right now," said police Supt. Garry McCarthy to justify overtime.
Chicago Police Supt. Garry McCarthy also said murders were down 20 percent this year.
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