Casey Anthony's former attorney, Jose Baez, lashed out at accusations that he had sex with his client before her murder trial, telling Fox News on Tuesday the investigator who made the claim was "a complete and total moron."

Dominic Casey, who worked for the Orlando-area mom's legal team in 2008 after the disappearance of her 2-year-old daughter, Caylee, claimed in court documents that Baez had sex with Casey Anthony in exchange for payment. The investigator also said Baez told him the mom killed her daughter and dumped the body.

In his first TV interview since the accusations surfaced, Baez told Fox & Friends that Dominic Casey's new claims flew in the face of his sworn deposition in the case. "He'd better pray to the god of punk wannabe private eyes that some U.S. attorney in Tampa does not see these transcripts and decides to charge him with perjury."

Baez confirmed that he planned to seek legal action against the investigator, but would not elaborate. He also said Dominic Casey previously claimed the drug lord Joaquin "El Chapo" Guzman helped pay the defense team.

"One, 'El Chapo' did not finance Casey Anthony’s defense. Two, I did not have an inappropriate relationship with Casey. Three, drug traffickers did not kidnap Caylee and take her to Colombia. Four, she never told me that she murdered her child and where the body was. And five, the post office is not involved in Caylee Anthony's disappearance," Baez said.

In the new court papers, Dominic Casey claimed, "I arrived at Baez’s office unexpectedly one day and once again, witnessed a naked Casey. This time she ran from his private office, through the conference room to the hallway. That night I told her that she cannot allow him to continue engaging in this behavior. Casey told me she had to do what Jose said because she had no money for her defense."

The attorney said it obviously was a mistake on his part to hire Dominic Casey in the first place. "I took a chance on him, and unfortunatey I'm paying for it today."

He said the investigator worked for free for three years, first for the legal team and then separately for the Anthony family.

Caylee Anthony's remains surfaced in December 2008. A jury found Casey Anthony guilty of lying in July 2011 but acquitted her of murder.