One of the witnesses called to the stand during William Balfour's trial might have saved Julia Hudson's life.

In testimony Thursday, Robbin Myers said Balfour not only told him "If I find that she cheating on me, I'm f***** her and him up," but that he saw Balfour with a gun.

According to the Chicago Sun Times, Myers said he saw Balfour with a gun twice, the last time outside Julia Hudson’s bus company, pacing and looking upset. After seeing Myers, Balfour sped off.

"I guess I stopped him from what he was fixing to do,” Myers told the jury.

Testimony has been ongoing all week in the trial, with Jennifer and Julia Hudson attending each day. Diane Grant, a woman who claims to have been Balfour's mistress, was among those that testified.

Balfour is facing a life sentence for killing Jennifer Hudson's mother, brother and nephew in 2008.

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