SEATTLE-- The parents accused of withholding food and water from their 14-year-old daughter for years pleaded not guilty Monday.

Rebecca Long and Jon Pomeroy are each charged with one count of criminal mistreatment in the first degree and one count of criminal mistreatment in the second degree.

The KING 5 Investigators have uncovered exclusive details about the case.

New documents we've obtained shed light on what was really happening inside the Carnation home.

They allege that Long, a former Microsoft employee, kept her step-daughter in a hostage-like setting.

KING

Rebecca Long and Jon Pomeroy appear in court.

Police say in addition to only letting the girl drink a few tiny Dixie cups of water a day, Long wouldn't let her go outside or play with friends, use the computer, read books, talk on the phone or pet the family dog.

The girl reports it was so bad, her stepmother would watch her brush her teeth to make sure she didn't swallow extra water. And because the faucet was loud, she'd sneak drinks from the toilet.

The new information comes from documents written to obtain a search warrant after police were called to the home this summer.

A neighbor, Adrienne Hale, heard screams.

"It was more like distress," Hale said, "extreme distress."

Inside police found a 14-year-old weighing just 48 pounds, with nearly every tooth falling out or rotten.

And now we know why the girl was screaming.

She told police her parents had given her a small piece of sausage to eat that day and it made her sick.

While her mother was away, her dad let her drink a glass of water.

When she wanted more water that night, her mother said no, that she was faking being sick.  Long allegedly then stepped on the girl.

"I feel sick.” said Hale. "We had no idea that was going on , if we did we would have done something about it."

Why was the girl locked up and starved?  The documents reveal the parents thought the girl had a behavior problem, was impulsive and oppositional.

They also told police she had a stealing problem.  Pomeroy said his daughter stole food and other items from her older brother, kids at school and from her teacher. But when police went to the school, the principal said there was no evidence of that.

The documents also detail a call to Child Protective Services in 2005.

Back then, the girl told teachers she was often locked in her room until the afternoon with no food while her stepmother slept and that Long hit and slapped her, but warned her not to tell anyone about it.

A CPS caseworker noted the girl was too skinny and advised the family to quit locking her up and to get counseling.

Despite repeated attempts, she never got hold of the father and closed the case, agreeing there had been abuse.

After that the girl was taken out of class and home-schooled.

Deputies took several items from the family's home during the search, including a scale, Dixie cups, several veterinary bills for the family dog, and Long's literature from Weight Watchers.

The girl and her younger brother are now both in foster care. The brother appeared well fed and healthy when police took them away.

At Monday's hearing, a no-contact order was issued, so Long and Pomeroy will not be able to see their children.

If convicted as charged, the sentence range is 36 to 48 months in prison.