Us is reporting that the “person of interest” in the shootings of Jennifer Hudson’s family had previously threatened to kill his ex-wife, Jennifer’s sister Julia Hudson, and to “mess up” her family.

Neighbors report that William “Flex” Balfour, currently in police custody, had been involved in a domestic dispute one month ago at Jennifer Hudson’s mother Darnell Donerson’s home in Chicago.

The dispute was reportedly over Julia Hudson’s claims that Balfour sold a car that he didn’t have permission to sell. Balfour fought with Jennifer Hudson’s brother Jason and her ex-fiance, James Peyton.

“Flex tried to start a fistfight with Jason, and James beat up Flex,” a source explains. Balfour reportedly then threatened the family saying “he would kill Julia and mess up everyone in the house,” the source adds.

This guy is a real Negative Nancy, and I’m sorry to use such language but I’m pretty upset. Since he killed three people I think we should find some way to kill him, then bring him back to life and kill him again and then once more. But you don’t tell him beforehand. It’s a surprise.