Prosecutors in Orange County, Fla., have said that letters written by Casey Anthony show she had knowledge of her daughter's death that had not been made public.

The Orlando (Fla.) Sentinel reported on Wednesday that a letter Anthony wrote to fellow inmate Robyn Adams allegedly said investigators found the bones of 2-year-old Caylee Anthony in a black garbage bag with a baby blanket in December 2008.

An Orange County sheriff's report released on Tuesday said that knowledge of the baby blanket had not been made public at the time.

The report further said, "Casey Anthony had knowledge of items only the suspect, certain law enforcement personnel and the certain medical examiner's personnel knew."

Anthony, 24, is charged with murder in the death of her daughter, whose remains were found near Anthony's home five months after she was reported missing.

It was further reported by the Sentinel that Anthony's lawyers reviewed the letters and did not object to their release. (With Inputs from Agencies)