ORLANDO, Fla. -

One of the attorneys Casey Anthony confided in to prepare for her murder trial told the CBS News show "48 Hours Mystery" that her former client lied when she said a nanny kidnapped her daughter, Caylee.

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Linda Kenney Baden, who left the defense team in October, said, "She lied. Sure. I think everyone knows that was a lie," referring to Casey?s claim that Caylee was kidnapped by a babysitter named Zenaida Gonzalez.

Investigators have found no evidence the babysitter ever existed.

Kenney Baden joined the defense team on Dec. 11, 2008, just hours before Caylee?s body was found in the woods around the corner from the Anthony family home. She ended her representation nearly two years later, saying she could not afford the travel costs from New York after Casey was declared indigent by the court after spending all of the $200,000 ABC News paid her for photo and video rights.

In the interview, which airs at 10 p.m. Saturday on Local 6, Kenney Baden also said Casey?s "actions have been her own worst enemy."

Caylee was not reported missing for a month after she was last seen alive with Casey by her grandfather, George Anthony, on June 16, 2008. It was only after Casey was located by her mother, Cindy, on July 15 that Cindy reported the child missing.

During the intervening weeks, Casey lied to her mother about her whereabouts, while living with a boyfriend and other friends, and visiting nightclubs.

Asked by CBS about prosecutors' theory that Caylee was asphyxiated by duct tape placed around her mouth and nostrils, current defense attorney Cheney Mason said there was "no evidence of that ? That's a figment of the imagination of an overzealous prosecutor in my opinion. And we'll enjoy dealing with that in the courtroom."

Defense attorney Jose Baez was asked about what Cindy and others described as the smell of a dead body in the car Casey drove while Caylee was missing.

"I think the evidence is clear that there was a bag of garbage in the trunk of the car in the summer heat for approximately three weeks. The car stunk. There's no doubt in that," he said.

But, Baez added, "There is nothing that is exclusive to a human being that was found in the trunk of the car."

The state claims a hair showing signs of having fallen from the head of a deceased human, as well as chemical signatures indicating human decomposition, were found in the trunk.

Judge Belvin Perry has yet to rule on whether that scientific evidence will be allowed in the trial.

Jury selection is set to begin May 9 in an undisclosed Florida county, with opening arguments set to begin May 17 at the Orange County Courthouse in Orlando.

Casey, 25, is charged with first-degree murder, aggravated child abuse, aggravated manslaughter and lying to police. If convicted of the murder charge, she faces a possible death penalty.

Watch Local 6 News for more on this story.