{blackbabes} Jennifer Hudson's Ex-Brother-in-Law Convicted of Family Murders

Jennifer Hudson's former brother-in-law was convicted Friday of three counts of murder in the shooting deaths of her mother, brother and nephew.

The jury in Chicago delivered its verdict against William Balfour, 31, after about 18 hours of deliberations. He faces a maximum penalty of life in prison.

Balfour was charged with the murders of Hudson's mother Darnell Donerson, brother Jason Hudson and 7-year-old nephew Julian King in 2008.

Prosecutors alleged Balfour acted out in a jealous rage over what he thought was another man in the life of Hudson's sister, Julia.

Hudson, 30, attended the trial and was the first witness, telling jury through tears that she had warned Julia against marrying Balfour.

"None of us, myself, my mother, or my brother, we did not like how he treated her, and I didn't like how he treated my nephew," Hudson said.

Balfour, who was estranged from Julia at the time of the killings, pleaded not guilty, and his lawyer challenged the forensic evidence in the circumstantial case that lacked DNA evidence or fingerprints.