Chicago Police say a gun, found near where 7-year-old Julian King's body was discovered, is being tested to see if it was used in the Hudson family slayings.
Law enforcement sources told the Chicago Tribune the gun police recovered Wednesday from a vacant lot about a block from where Julian's body was found matched the caliber of weapon used in the slayings.
Some preliminary results from forensic testing on the gun may be available by Thursday, the newspaper said.
Police have named William Balfour, the estranged husband of Jennifer Hudson's sister Julia, as a person of interest in the case. Although he is being held on a parole violation, he hasn't been charged in connection with the triple homicide.
