Exclusive: A crucial witness in a fatal Adelaide shooting revealed to 9News that she had a conflict with the deceased, adding that “nobody was supposed to die”.

Emma Pearce resides in the Munno Para West house where 53-year-old Troy Jacka lost his life on Saturday night. According to police, a fight broke out between Jacka and another man, during which a firearm in Jacka’s possession accidentally discharged.

Pearce mentions she had ongoing issues with the deceased after separating from his son Jayden. She also reports that her home was vandalized earlier on Saturday by unidentified individuals.

“My whole house was destroyed,” she told 9News.

“My son’s room was smashed up. I don’t have [a] window in my house. My doors were kicked in. I have no locks.

“And I had $1400 stolen from me.”

Hours later, she was allegedly involved in a fight with Jacka and others at the Smithfield Hotel, which she claims led to Jacka coming to her home.

“There was a car that drove straight through my fence and a shotgun pointed straight at me,” she said.

“I froze for a second. Everyone was screaming around me.”

She said she ran to the laundry to hide.

Terrifying video has emerged of a woman screaming “he’s got a gun”, moments before a shot rang out at the home.

“I heard screaming and I went out to my ex-boyfriend’s dad dead in my driveway,” Pearce said.

She said she doesn’t know how the gun went off.

“No one was supposed to die that night. There was no intentions of anyone dying that night,” she said.

Police are investigating, but have not laid any charges in relation to Jacka’s death.