Supt. Eddie Johnson said the bill should put repeat gun offenders on notice that they will go to prison.
David Purnell was acquitted of all charges after being arrested Jan. 1, 2014.
Donovan was on his way with his family to get Christmas haircuts in December 2013 when he was killed.
The man was shot Saturday evening in the 4800 block of South Racine Avenue.
The move is designed to raise the standards for all CPS preschool students, officials said.
As CPS plans new neighborhood high schools, the share of students attending those schools is shrinking.
Murals, sculptures and installations will be unveiled in each of Chicago's 50 wards by the end of 2017.
Shootings have wounded four people just since early Friday.
Orr, 72, who served 39 years in elected positions, will become a fellow at the University of Chicago.
The inspector general's office reviewed 300,000 emails during the probe.
The full City Council is expected to approve the crackdown at its meeting Wednesday.
Teacher Moises Bernal faces up to six months in jail for contempt of court at a Jason Van Dyke hearing.
The clock was derided as "tacky" by one aldermen. Activists criticized the 3-minute proposed limit.
Most recently, a woman was shot to death in an apparent murder-suicide on the Skyway.
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