Police in Chicago are confirming that they have recovered the weapon that was used to kill Jennifer Hudson's mother, brother and nephew.

Police in Chicago are confirming that they have recovered the weapon that was used to kill Jennifer Hudson's mother, brother and nephew. The weapon in question is the .45-caliber gun that was discovered Wednesday in a vacant lot near where the body of Hudson's nephew was found a few days earlier. The body of Julian King was found in the back of a SUV in a West Side neighborhood. Last Friday, the bodies of Hudson's mom and brother were found in the family's home. Police superintendent Jody Weis says the weapon has been positively identified through forensic exams as the weapon used to kill all three. Weis says while police are glad they have been able to link the weapon to the shootings, there is still much work left in solving the case. Nobody has been charged in the killings. However, the estranged husband of Hudson's sister is in custody on a parole violation. Police have called William Balfour a "person of interest" in the case.