Man killed after partner’s ex allegedly douses couple in petrol and sets home alight in SA’s Redhill

A man has been killed and his partner seriously injured after her former partner allegedly doused the couple in petrol and set their home alight in South Australia .

Don Couzens, 65, had travelled from Mildura to Redhill in the state’s Mid North to spend the weekend with his partner, Jenni Henderson, when the alleged domestic violence attack unfolded about 7pm on Saturday.

Witnesses said the couple were enjoying a quiet night at the Hope St property when Henderson’s former partner arrived.

Footage obtained by 7NEWS shows the house engulfed in flames as the fire tore through the property.

Henderson managed to escape the burning home and ran across the road to a neighbour for help.

“They were both covered in petrol. She was burnt from the waist down terribly,” Manning said.

Another neighbour, James Winstone, ran towards the inferno after hearing desperate cries for help.

“I came running down to do what I can and there was someone in the front door, so I dragged him out,” he said.

But the man Winstone pulled from the burning home was the 63-year-old who police allege had started the blaze.

Manning said Couzens and Henderson had only recently begun their relationship and described the pair as deeply in love.

“They were just smitten with each other. It’s only been a new recent thing.”

The alleged offender and Henderson were both airlifted to the Royal Adelaide Hospital with serious burns.

Henderson was in a stable condition, while the 63-year-old man was being treated for life-threatening injuries.

Major Crime and forensic officers joined local detectives at the charred property on Sunday as investigations continued.