A TEENAGE girl starved to death wearing a dirty adult nappy in squalid conditions at her adoptive mother's cat-ridden house.

Tragic Natalie Finn, 16, died in October after being found lying on the filthy floor at her home surrounded by urine-soaked blankets.

5 Natalie Finn was found emaciated and lying on the floor of her adoptive mother's home wearing only a nappy Credit: Facebook

She was rushed to hospital but died from a heart attack caused by severe starvation.

Natalie's two adoptive siblings - a boy, 15, and a girl, 14, were found severely underweight and had bedsores

Her adoptive mother Nicole Finn, who has been charged with her murder, is accused of keeping Natalie - and her brother and sister - in the house against their will to be tortured and starved.

5 Nicole Finn is accused of murdering her adoptive daughter and abusing her two siblings. Credit: West Des Moines Police

She kept the three teens in the house in West Des Moines, Iowa, by nailing boards to the windows of the houses to stop them escaping and begging for food, officials said.

Natalie had been lying in her own waste for some time before she was found - and blankets soaked in urine covered the floor, the Des Moines Register reported.

5 Natalie Finn was kept in a room with no furniture and urine-soaked blankets on the floor Credit: Facebook

Official reports said that animals "roamed freely" throughout the house - including over a dozen kittens and cats.

There was no furniture in any of the teen's bedrooms, investigators said.

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Natalie's adoptive mother has been charged with her murder and the abuse and neglect of her siblings.

The children's adoptive father Joseph Finn, who was separated from their mother and lived separately, is accused of kidnap, child endangerment and neglect.

5 Child protective services visited the house before Natalie's death Credit: Facebook

He told cops that the children liked coming to his house more as they were given more to eat.

Teachers called child protective services to the house after noticing that Natalie was coming to school dirty and hungry.

A health worker - who was later fired - visited the house and saw that Natalie was wasting away but wrote that she was starving herself in official reports.

5 Natalie's adoptive father Joseph Finn is accused of kidnapping, neglect and child endangerment. Credit: West Des Moines Police

Although she found the children were scared of their adoptive mother, she said there was not enough evidence to remove them from the home.

Senator Matt McCoy said: "What happened to not only Natalie but her siblings was preventable.

"It's a horrific situation and I feel heartbroken for Natalie and her siblings who were, in essence, sealed in that room and left to die."

Both parents are currently in jail awaiting trial.

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