Tyshawn Lee's body was found riddled with bullets not far from his home on Chicago's troubled South Side on November 2.
"Chicago Police detectives have made an arrest in the unspeakable murder of 9 year old Tyshawn Lee," police spokesperson Anthony Guglielmi said on Twitter just hours before dawn.
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Chicago Police detectives have made an arrest in the unspeakable murder of 9 year old Tyshawn Lee. Press announcement later this morning.
— Anthony Guglielmi (@AJGuglielmi) November 27, 2015
He said a press announcement would follow later.
Police Superintendent Garry McCarthy said the boy was lured into the alley and killed because of his father's gang involvement, according to the Chicago Tribune.
Chicago's South Side has seen a drastic rise in homicides in recent months, but Lee's death in particular has captivated the city, prickling the conscience of many in Chicago.
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Mayor Rahm Emanuel vowed earlier this month to find and prosecute Lee's killers.
"Whoever did this, there is a special place for them," he said.
"I hope they never see daylight, and I think anybody who knows who this is... you have a moral responsibility to come forward."
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