Supt. Garry McCarthy said "very young kids" were involved in Friday's slaying of an 11-year-old girl.
Shamiya Adams was an "active member" at the First Baptist Congregational Church, its pastor said Sunday.
Shamiya Adams was on a sleepover with friends when a bullet entered the house and struck her.
The 12-year-old girl is in stable condition after suffering graze wounds in the foot.
One man was killed and five others were injured in shootings overnight, police said.
At least four people were wounded in shootings across the South and West sides Friday, police said.
There were two additional drive-by shootings in Brainerd and Greater Grand Crossing.
Superintendent Garry McCarthy addressed the weekend violence Monday morning.
North Lawndale and Oakland surprised with good ratings, while North Center, Lincoln Square disappointed.
Jose Hernandez trains mariachi teachers across the country and has high hopes for Chicago's program.
Seven people shot and killed are among the victims of gun violence since Thursday night, police said.
Shambreyh Barfield was killed Thursday in West Garfield Park, the neighborhood where she grew up.
A man was killed in West Englewood, while the others were shot across the South and West sides.
The shooting occurred in the 3800 block of West Monroe Street at 4:30 p.m. Thursday, police said.
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