Several people close to the case said Wednesday that Anthony, who is accused of killing her two-year-old daughter Caylee, had received letters in jail from Peterson, who sits on death row in San Quentin State Prison for killing his wife Laci and their unborn son Conner three years ago.
After that report was published in the Orlando Sentinel, police began investigating. They say Anthony has never received a letter from the convicted killer. The paper says the story may have originated with Anthony herself, who talked to a corrections officer about mail she received.
A spokesman for her lawyer says Anthony had received a letter from a person with the last name Peterson who lives in San Diego, but nothing from the convicted killer. The spokesman said Baez screens his client's mail and would know if any correspondence had taken place.
None of the sources who spoke to the newspaper saw the actual letters.
A spokesman at San Quentin State Prison in California says the prison does not track Peterson's mail. And the spokesman said he did not believe that any letters came from the prisoner.
The cases do share striking similarities:
• Casey Anthony reported in July that her daughter Caylee had disappeared after being left with a baby sitter in June. Caylee's body has not been found, but Anthony was recently charged with first-degree murder.
• Scott Peterson reported his wife Laci missing in December 2002. The bodies of his wife and unborn child washed ashore in April 2003 in the San Francisco Bay. Peterson was convicted of the killings and sentenced to death in 2005.
Both Casey and Scott maintain their innocence.