Police have no suspects.
Julian King was missing all weekend after an unidentified assailant fatally shot Hudson’s mother Darnell, 57, and brother Jason, 29, on Friday.
At 7:05 a.m. Monday, Chicago police discovered the slain boy — who was shot multiple times, according to the Tribune — in the back seat of an abandoned white 1994 Chevy Suburban on Chicago’s West Side.
Chicago police call the killings “domestic related.”
Though he has not been charged, William Balfour — the estranged husband of Julia Hudson, Jennifer’s sister — was taken into custody Friday by Chicago police for questioning.
The 27-year-old Balfour — who spent nearly seven years in prison for attempted murder, vehicular hijacking and possessing a stolen vehicle — is not the boy’s father.
He is being held at the Illinois Department of Corrections on a parole violation “unrelated to this investigation.”
Balfour’s mother, Michele Balfour, has said Jennifer Hudson’s mother kicked Balfour out of the family home last winter. She denied her son had anything to do with the killings.