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Murder charges have been filed in the grisly execution-style murder of a 9-year-old Chicago boy. 

Dwight Boone-Doty, 22, was charged with first-degree murder in the death of Tyshawn Lee, who was lured from a city park into an alley and shot in the head.

Police say the murder last November was retaliation by another gang against Lee's father.

The father reportedly refused to talk to police after his son's murder, adhering to a code of silence among gang members. 

Police said Doty planned to return to the playground to kill more children, but police were already there.

They also believe he had been surveilling other family members, including the boy's grandmother.

Doty, already jailed in a separate murder case, was charged after reportedly bragging to a police informant about killing the boy, and allegedly planned to write a rap song about it.

Cook County State Attorney Anita Alvarez said she has dealt with many gang murders over the years, but she has never been more "disgusted and appalled" by a case.

Watch the report from The Real Story above.

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