Casey Anthony offers new theory into Caylee's death, says she may have been date raped during party

ORLANDO, Fla. - Months before her trial began, Casey Anthony told a psychiatrist she thought her father was responsible for her daughter Caylee's death.

"He held her underwater," Anthony told psychiatrist Jeff Danziger about her father George. "Maybe he was doing something to her and tried to cover it up."

She claimed her father later disposed of Caylee's body, telling her, "Daddy will take care of it."

Anthony was acquitted last July of killing her 2-year-old daughter. Caylee went missing in summer 2008, and her disappearance wasn't reported to authorities until a month later.

During the trial, her defense team claimed Caylee accidentally drowned in the family swimming pool. Danzinger interviewed Anthony five times over a two year period, but never testified during the trial.

In newly released depositions, Danzinger says Anthony told him she became pregnant after passing out at a party when she was 18 years old. She said she didn't know who the father was.

"Two beers, possibly given another drug. Woke up passed out," Danzinger read from his notes taken in a November 2010 interview.

Those notes also indicated Anthony was mostly upbeat during the jailhouse interviews, and "surprisingly cheerful" as she spoke about the death of her daughter.  The deposition says two psychiatrists indicated Anthony showed no sign of mental illness and had normal results on psychological tests.

Anthony is currently serving a year of probation at an undisclosed location in Florida on a check fraud charge.