A jailhouse informant provided the key evidence that led to charges against the alleged triggerman in the execution of 9-year-old Tyshawn Lee, law enforcement sources said Tuesday. An inmate in the Cook County Jail told authorities that Dwright Boone-Doty was bragging about shooting Tyshawn, sources said. Cook County sheriff’s officials notified the Cook County state’s attorney’s office and Chicago Police Department, whose detectives interviewed the informant. When detectives decided the informant was credible, they obtained court authorization for the informant to wear a wire, which...
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