ORANGE COUNTY, Fla. -- By now you know Casey Anthony is Caylee's mother, but detectives want to know who the father is. It's a question Casey's own family can't answer, but there are some clues.

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VIDEO REPORT: FHP Report Could Help In Search For Caylee's Father

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Channel 9 has learned the Orange County Sheriff’s Office is interested in an FHP crash report that might be a clue as to who Caylee’s father actually is or may reveal another lie told by the little girl’s mother.

Eyewitness News spent the day knocking on doors Monday looking for relatives and friends of Jesus Ortiz, a 21-year-old killed in a car crash. In death, he's being dragged into the Caylee Anthony saga.

"I've never heard that name before," Cindy Anthony told Eyewitness News.

Caylee's grandmother Cindy claims no knowledge of Ortiz, slthough she has said Caylee's father was killed in a car crash. That crash investigation included a blood test for toxicology. Now investigators may use that sample in a post-mortem paternity test.

There seems to be a very interesting clue on the Internet, as well. Jesus Ortiz's MySpace page is still online and a condolence message was left in the name of none other than Caylee Marie Anthony.

Meanwhile, when Channel 9's Jeff Deal approached the potential father's family, they were shocked at the mere possibility that Jesus might be Caylee's father.

"The father? No," family members told Eyewitness News Monday.

Another possibility has been tossed around as well, that even Casey doesn't know who Caylee's father is and made up yet another lie about the mystery father who died in a car accident.

The medical examiner's office said the blood is still available for a paternity test. In the crash, Ortiz was found at fault and alcohol was not involved.