CHICAGO, Illinois (CNN) -- The mother of a man police have questioned about the slayings of three of Jennifer Hudson's family members said Tuesday night that her son was not involved in the crime.
"No means did my son do this," Michele Davis-Balfour said on CNN's "Nancy Grace."
She said that her son, William Balfour, 27, was with a girlfriend Friday when the bodies of Jason Hudson and Darnell Donerson, Hudson's brother and mother, were discovered shot to death in their South Side Chicago home.
"My son's alibi was [he was] with one of his girlfriends, OK?" Davis-Balfour said. When Grace asked which girlfriend he was with Friday, the mother said her son was with a woman named Diana on Friday night, and with a woman named Kate on Saturday morning.
Davis-Balfour said her son is separated from Julia Hudson, Jennifer Hudson's sister. It was Julia Hudson who discovered her mother's body, police said. Authorities were notified and they arrived at the home and found Jason Hudson's body.
At that time, a search began for Julian King, who is Julia Hudson's 7-year-old son and Balfour's stepson. That hunt ended Monday when the boy's body was found by police in an abandoned white Chevrolet Suburban SUV on the West Side of Chicago.
A Tuesday autopsy report revealed Julian had been shot multiple times, but the Cook County Medical Examiner's report did not say when the child died and where his wounds were.
William Balfour was detained for questioning in connection with the killings, a police representative said. Julian was not with Balfour when he was detained, officials said.
Balfour is in state custody for a parole violation. He spent nearly seven years in prison for attempted murder, carjacking and possession of a stolen vehicle and was released in May. Police have so far refused to discuss precisely how he violated parole.
Balfour was also arrested in June for drug possession, officials said, but there was not enough evidence to constitute a parole violation. Chicago news station WLS reported that cocaine was found in Balfour's car.
Authorities said only that Balfour's parole violation was of a "technical" nature, which could range from a curfew violation to missing an appointment with a parole officer. WLS reported that Balfour missed an appointment with his parole agent Friday. The agent phoned Balfour, who told the agent he was baby-sitting, the station said.
Balfour violated his parole by possessing a weapon and by failing to attend an anger management class and a substance abuse program, according to WLS.
On Monday, Davis-Balfour spoke about the nature of her son's relationship with Julia Hudson.
On Julia Hudson's MySpace page Monday afternoon, she wrote: "Now because I chose to do what was natural to me and love someone, it cost me my beautiful family, my wonderful beautiful loving supporting mother, Darnell, my true blue baby brother, Jason, I love u big baby ... and last but never not least, my only son, Julian."
Davis-Balfour disputed that her son and Julia Hudson had a rocky relationship. Grace asked if the two were "romantically" involved, and Balfour answered that they were. Julia Hudson and her son were together Thursday night after she invited Balfour to celebrate her birthday by having cake.
"People don't understand what's going on. My son loved her. She loved him," Davis-Balfour said. "... Regardless to whatever anyone says, my son still loved Julia."
Davis-Balfour expressed anger that her son's picture has been splashed on media reports since Friday, though reports have been careful to point out that police have not named him as a suspect in the killings.
"You all have put my son's face on worldwide news like he's -- like he's Attila the Hun," Davis-Balfour said. "You all are not saying that my son obtained his GED while he was in the correctional facility. You all are not saying that my son took up horticulture while he was there. William is a very smart and intelligent young man."
The mother also discussed her son's criminal past, elaborating on his carjacking and attempted murder charges.
"No, he has never done bodily harm to no one. He has never been the type of kid that you could say was a violent type," she said.
"My son -- it was still in the man's car, right? The man saw my son starting his car. He ran outside, jumped on top of his own vehicle.
"This is why they said vehicle hijacking, because my son jumped -- the man jumped on top of the car while my son was stealing it, right? He stuck his hand inside the driver's side and started choking my son. So my son kept driving even more, took the owner of the vehicle on a high-speed ..." Davis-Balfour said.
Authorities said they are confident they will soon catch the killer.
"I suspect that we'll have some evidence that will link us to the killer," Chicago Police Superintendent Jody Weis said Tuesday.
Police are collecting evidence from the SUV and reviewing surveillance tapes from all over the city as the investigation continues, Weis told reporters.
"There's a lot of work to be done. We'll be sure we go through this thoroughly," Weis said. Asked about possible motives, Weis replied, "We don't know what the motive really was at this time. But, clearly, you have people who do know each other, so it wasn't a case of a stranger-type homicide."