Bridgette Wilson claims her son was nowhere near Toyher Stober on the night he was murdered in October 2014.
Wilson, 20, from Heinz Park is being tried on 15 charges including six counts of murder, three counts of rape, attempted murder and assault with the intent to do grievous bodily harm.
Bridgette told the court the night Stober was shot and killed, her son was at home playing TV games.
“I was home making myself some tea when I heard gunshots. Cameron was in the sitting room playing Xbox games.
“He paused the game and then ran out to go see who was shot. He was gone for a few minutes. He then came back to me saying Pang [Stober] was shot,” the court heard.
Bridgette says her brother, who was also at the scene, then came to warn her to lock her gates as the mense were coming for Wilson.
“I was standing at my front door when my brother shouted at me to lock the gates because the punkies want to come to my house as they say it was Cameron [who killed Stober].
“I locked the gates and called my husband to tell him what had happened and that he had to come home,” Bridgette testified.
The State prosecutor lashed out at Bridgette stating her testimony does not corroborate with that of her son.
“The accused told the court you were [at the time of Stober’s death] in your bedroom,” the State said.
“He probably spoke incorrectly,” Bridgette responded.
Asked where Wilson was when her brother came to warn her that people were accusing her son of shooting Stober, she replied: “He was in the house, he could hear [what my brother was saying] but he went on playing games. How can they blame him if it wasn’t him?”
The trial resumes on Monday.