Kristy Armstrong murder: Troy Armstrong uttered six chilling words to his estranged wife during an argument. Seven months later they came true

A man who murdered his estranged wife by driving his pickup truck into her car at 90mph made a terrifying threat months before the horrific killing, her grieving family has revealed.

Kristy Armstrong, 36, died on June 9 last year 400 metres from her home in Molong, near Orange in Central West North South Wales.

The mother of three was killed instantly on her way home from school when a pickup truck driven by her estranged husband Troy Armstrong collided with her green sedan.

Troy, 35, was charged with murder and two counts of attempted murder after two children, ages eight and 11, who were in the backseat, were injured in the crash.

Last month, five days before the anniversary of his horrific crime, he committed suicide in prison.

Chilling doorbell footage obtained by A Current Affair has emerged, showing a heated argument Kristy and her estranged husband had outside her home in the months leading up to her death.

Troy had smashed a window to get the keys to the family car when Kristy confronted him in front of a neighbor.

“Are you going to help or are you just going to accept this?” Kristy begged the neighbor as Troy drove away in the car.

The mother of three was killed instantly when her green sedan collided with a pickup truck (pictured) being driven erratically by her estranged husband Troy Armstrong while driving home from school

Troy then replied, “Are you going to help? Are you going to run her over?”

Kristy filed a motion for a preliminary injunction against her ex in November, but was not granted a preliminary injunction until May, court documents show.

Less than a month later, she died.

A close friend claimed that the police did not take Kristy’s fears seriously.

“The police officer who came out when Kristy opened the door said something like, ‘Oh, this is Troy Armstrong’s house. He would never do something like that, this must be a mistake,’ and he left,” the friend told the program.

Kristy’s parents are grieving and are now raising her children.

They allege their daughter was verbally, emotionally and physically abused for months.

The couple claimed their estranged son-in-law had punched holes in the walls and sent Kristy a message saying, “What’s the point? It’s either I die or you die.”

“He had told Kristy, ‘If you leave, when you come back the house will be burned down, the cat will be dead and I will be dead too,'” Donna Thornell said.

Troy Armstrong committed suicide in prison last month, five days before the anniversary of his horrific crime. He is pictured with Kristy in happier times.

Kristy’s heartbroken parents have called for more support groups

She added: ‘I just miss her so much and she should be here raising her kids. Not us.’

Her parents are trying to raise awareness about the epidemic of domestic violence in Australia.

“I just don’t think there are enough support groups in the local community and there’s not enough training for the people who participate in those support groups,” her father Peter said.

“And the police too, I think, and probably not enough staff. She was promised someone would come and put up cameras, change the locks, do this and that, and no one came.”

Ms Thornell said Troy’s decision to end his life rather than face punishment showed he was “selfish to the end”.

“Five days before the birthday, he decided again what he wanted to do,” she said.

Her husband said they felt “relieved at first” but now feel “cheated” because they “didn’t get the chance to see him proven guilty.”

Troy had not yet entered a plea when he committed suicide in his cell at the Metropolitan Remand and Reception Centre in Silverwater, western Sydney, on June 4.

If you or someone you know needs support, please contact Lifeline 13 11 14 or 1800 RESPECT