Update: Jennifer Hudson Mom & Brother Murdered..Suspect In Custody Hudson sister Husband!!

Per sources at TMZ law enforcement now say they are indeed looking into what appears to be a dispute over a car in the investigation of the murders of Jennifer Hudson's mother and brother. William Balfour, the estranged husband of Hudson's sister, Julia, is in custody but isn't talking. Balfour spent nearly 7 years in prison for attempted murder, vehicular hijacking and possession of a stolen vehicle. Here's the most interesting thing -- neighbors in the area who know the family well say a few weeks ago a family member tried stealing a car, which triggered a heated argument in which the would-be thief promised revenge. No one was named specifically, but Balfour pictured below with Jennifer Hudson sister Julia. Suspect Balfour boost on his Myspace page his relationship to Jennifer Hudson Calling himself "FLEX A MILLION", Balfour says:

I AM A 26 YEAR OLD, I RESIDE ON THE SOUTH SIDE OF CHICAGO, I HAVE A WIFE HER NAME IS JULIA, AND I ALSO HAVE A 6 YR OLD STEPSON, I DON'T TOLERATE BULLSHIT, SO DON'T COME TO ME WITH IT, I LIKE TO LIVE LIFE AND EXPERIENCE EVERYTHING THATS WHY I'M HERE SEEING WHAT IT'S ABOUT, I MIGHT AS WELL LET YOU ALL KNOW THAT JENNIFER HUDSON IS MY WIFE'S SISTER I'M PROUD OF HER AND WISH HER NOTHING BUT THE BEST IN WHAT SHE DO BUT DON'T HIT ME UP ASKING BOUT HER, OTHER THAN THAT IT'S ON!

William also lists himself as a "proud parent". His 7 year-old step son is still missing. Pictured below is Jennifer Hudson Brother who is now deceased. As captioned below the pic words used by Hudson sister on her Myspace page about her Husband who is now the suspect Several other neighbors this morning who say Julia complained to them that William Balfour sold one of their cars without permission. One neighbor told TMZ the dispute got so heated William threatened to

"kill Julia's family"

but she didn't report it because she didn't take it seriously. As for the dispute over the car being the trigger, our sources say cops are pursuing the lead but are looking at everything. Sad part is members at the church where the tight-knit family worshiped said Jennifer Hudson offered to move her mother out of the area, but Donnerson refused to leave. It wasn't the neighborhood that caused this it was a family member.

The star is asking for privacy in her time of grief. Her Web site jenniferhudsononline.com is already filled with condolence notes.

*********************************************************************************** HOUSE OF GLITZ: We at the HOUSE OF GLITZ pray for Jennifer Hudson family at this difficult time and hopes that all parties involved will get prosecuted to the fullest extent of the law. This is a heartbreaking story.