The body of Ariki Rigby, 18, was found by a horrified dog walker following the sickening attack in Havelock North, New Zealand.
Her body was so badly burned that cops first mistook it for a sheep carcass.
Ariki’s sister Anahera told true crime podcast The Felon Show: “You know they do say that she had broken bones.
“I suppose they forgot to mention that she also had her hands and feet cut off.”
She fears her sister never would have been found if it wasn’t for the dog walker.
Ariki was killed early in September last year, but cops didn’t realise her remains were inside until a passerby urged officers to return to the scene two days later.
Anahera added: “They [police] were going to get the car towed and crushed.
”We were so grateful that they found her otherwise she would have forever been declared a missing person.
”They had done a lot to her. I found out so much about her.”
But months on, police are yet to arrest anyone in connection with Ariki’s death.
Officers previously said potential witnesses may not have come forward due to the possible gang affiliations of those thought to be responsible, reports the NZ Herald.
The teen was visiting family when she was brutally killed.
Anahera told the podcast: “The last memory I have is of her walking out my door and jumping in her car.
“The window wouldn’t go up so I had to put a rubbish bag over it. It was raining. That was a sign she shouldn’t go anywhere.
“I was begging her to stay but she didn’t want to. I kept trying to tell her to stay.
“She wanted to go to Hastings and I told her, ‘You got beaten up there’.”