MIAMI -- Casey Anthony's attorney said he strongly considered early in the case whether she should plead guilty to a lesser charge to avoid the death penalty if convicted of murdering her 2-year-old daughter Caylee, but Anthony adamantly insisted she had nothing to do with the toddler's death.

In his just-published book "Presumed Guilty, Casey Anthony: The Inside Story," attorney Jose Baez said prosecutors offered in 2008 to allow Anthony to plead guilty to aggravated manslaughter of a child and serve up to 13 years in prison. Baez said in an interview with The Associated Press that in those early days he thought taking it might be in Anthony's best interest.

"There were times, difficult times, when the evidence didn't look good for Casey," Baez said, adding that it was his obligation as a lawyer to convey any such plea offers.

Anthony, he said, "would not entertain it for a second." As he became more familiar with the state's mostly circumstantial case, Baez said he grew convinced she would be acquitted by a jury – as she was a year ago Thursday of all charges except for four misdemeanors of lying to investigators.

"There was nothing in the trial that ever made me think Casey was guilty of anything as related to the murder," Baez said. "Every single piece of evidence favored us."

Prosecutors claimed Anthony suffocated Caylee with duct tape so she could spend time with her boyfriend and be free for Orlando's nightlife. Baez said during the trial – repeated again in his book – that Caylee accidentally drowned in a family swimming pool and that her father, George Anthony, hid the body. Baez also claimed George Anthony sexually abused his daughter.

George Anthony denied both allegations, and there was little brought up about them during the trial. Baez said the defense wasn't required to put on any such evidence because proving the case is the prosecution's burden, not the other way around.

Evidence and testimony showed that Anthony was a habitual liar, even making up fake friends and pretending every day to go to a job she didn't have. Baez was asked whether Anthony's lies surrounding her daughter's disappearance might be indicative that she was guilty.

"I don't think the lies are indicative of innocence or guilt," he said. "The lies were there long before Caylee passed away." In the book, he says Anthony had built a "fantasy world," and her lies weren't evidence of guilt but signs of someone with "serious mental health issues."

Baez said one piece of prosecution evidence he was most concerned about was that police cadaver dogs had indicated a body may have been in the trunk of Anthony's car at one point and also that a body may have been in the backyard. None was discovered in the backyard and there was nothing but rotting bags of trash in the trunk.

But, he said, people – and jurors – believe in dogs.

"That concerned me a little bit. Most people really think dogs can do magic," Baez said.

The prosecution's flaw, he added, was that regarding the car search the dog and handler were focused only on Anthony's vehicle and did not include others in a lineup to give the dog options.

Overall, Baez attributed the strong public backlash against the jury's verdict to a lack of understanding about the judicial system and because "a lot of people bought into the hype" that Anthony must have been guilty. He noted that jurors who gave media interviews after the trial said they waited for weeks for strong evidence that never came.

"We need to talk about whether an actual murder occurred," he said. "That's where the focus should have been, and it never was."

Baez declined to comment on what Anthony is doing these days and on how often he talks to her. He said he promised her confidentiality when she agreed that he could write his book, in which she did not participate. Anthony is living in an undisclosed location in Florida serving probation for an unrelated conviction, which Baez said ends on Aug. 21.

"She's doing a lot better than she was in prison," Baez said, but then added: "She's a prisoner of her own freedom."

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  • Casey Anthony Trial July 4, 2011

    Casey Anthony goes over paperwork during a break on the final day of arguments in her murder trial at the Orange County Courthouse in Orlando, Fla. on Monday, July 4, 2011. Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial July 4, 2011

    Assist. State Attorney Linda Drane Burdick presents the final portion of rebuttal at the Orange County Courthouse in Orlando, Fla. on Monday, July 4, 2011. Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial July 5, 2011

    Casey Anthony stands for the arrival of the jury at the start of the second day of jury deliberations in her murder trial at the Orange County Courthouse in Orlando, Fla., Tuesday, July 5, 2011. Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial July 4, 2011

    Spectators in the courtroom listen to the rebuttal presented by Assist. State Attorney Jeff Ashton on the final day of arguments in the Casey Anthony trial at the Orange County Courthouse in Orlando, Fla. on Monday, July 4, 2011. Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial July 4, 2011

    Assistant State Attorney Jeff Ashton gives the final rebuttal in the Casey Anthony murder trial at the Orange County Courthouse in Orlando, Fla. on Monday, July 4, 2011. Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial July 4, 2011

    Judge Belvin Perry listens as Assist. State Attorney Jeff Ashton present rebuttal on the last day of arguments in the Casey Anthony trial at the Orange County Courthouse in Orlando, Fla. on Monday, July 4, 2011. Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial July 4, 2011

    Casey Anthony with her attorney Dorothy Clay Sims on the last day of arguments in Anthony's murder trial at the Orange County Courthouse in Orlando, Fla. on Monday, July 4, 2011. Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial July 4, 2011

    Cindy Anthony, wearing bracelets in tribute to her granddaughter Caylee Anthony, listens during the final day of arguments in the trial of her daughter Casey Anthony at the Orange County Courthouse in Orlando, Fla. on Monday, July 4, 2011. Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial July 3, 2011

    Defense attorney Cheney Mason presents a burden of proof chart during closing arguments of the Casey Anthony murder trial at the Orange County Courthouse in Orlando, Fla., Sunday, July 3, 2011. Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial July 3, 2011

    Jose Baez points and yells in the direction of the prosecution table during his closing arguments in the Casey Anthony murder trial in Orlando, Fla., Sunday, July 3, 2011. Judge Belvin Perry called a sidebar during the arguments to deal with the outburst. Anthony has plead not guilty to first-degree murder charges in the death of her daughter, Caylee, and could face the death penalty if convicted on the charge.

  • Casey Anthony Trial July 3, 2011

    George Anthony listens to closing arguments in the murder trial of his daughter, Casey, in Orlando, Fla. on Sunday, July 3, 2011. Casey Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial July 3, 2011

    Casey Anthony reacts while listening to the state's closing arguments in her murder trial in Orlando, Fla., Sunday, July 3, 2011. Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty, if convicted.

  • Casey Anthony Trial July 3, 2011

    Assistant state attorney Jeff Ashton presents closing arguments for the state in the murder trial of Casey Anthony in Orlando, Fla., Sunday, July 3, 2011. Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial June 30, 2011

    Casey Anthony gestures during her murder trial at the Orange County Courthouse Thursday, June 30, 2011 in Orlando, Fla. Anthony, 25, has plead not guilty in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial June 30, 2011

    Spectator Matthew Bartlett is taken away by sheriff deputies on a contempt charge for his obscene gesture toward assistant state attorney Jeff Ashton during Casey Anthony's murder trial at the Orange County Courthouse Thursday, June 30, 2011 in Orlando, Fla. Casey Anthony, 25, has plead not guilty in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial June 30, 2011

    Lee Anthony testifies during the murder trial of his sister Casey Anthony at the Orange County Courthouse on June 30, 2011 in Orlando, Florida. Anthony's defense attorneys argued that she didn't kill her two-year-old daughter Caylee, but that she accidentally drowned.

  • Casey Anthony Trial June 30, 2011

    Krystal Holloway, also known as River Cruz, reacts when questioned about transcripts from her police statements during the Casey Anthony trial at the Orange County Courthouse in Orlando, Florida, Thursday, June 30, 2011. Holloway claims to have had an affair with George Anthony, Casey's father.

  • Casey Anthony Trial June 29, 2011

    George Anthony reacts during his testimony in the murder trial of his daughter, Casey, in Orlando, Fla., Wednesday, June 29, 2011. Casey Anthony has plead not guilty to first-degree murder in the death of her daughter, Caylee, and could face the death penalty if convicted of that charge.

  • Casey Anthony Trial June 28, 2011

    Casey Anthony sits in court at her murder trial at the Orange County Courthouse in Orlando, Florida, Tuesday, June 28.

  • Casey Anthony Trial June 28, 2011

    Lee Anthony, right, returns to his seat next to his mother Cindy Anthony after he testified in the murder trial of sister Casey Anthony at the Orange County Courthouse in Orlando, Florida, Tuesday, June 28.

  • Casey Anthony Trial June 28, 2011

    An aerial photo showing the location where Caylee Anthony's remains were found is projected on a courtroom monitor in the Casey Anthony trial at the Orange County Courthouse in Orlando, Florida, Tuesday, June 28.

  • Casey Anthony Trial June 28, 2011

    Roy Kronk, a meter reader for Orange County, testifies during the Casey Anthony murder trial at the Orange County Courthouse, Tuesday, June 28, 2011, in Orlando, Fla. Anthony, 25, is charged with killing her daughter Caylee in the summer of 2008.

  • Casey Anthony Trial June 28, 2011

    Roy Kronk, the meter reader who found Caylee Anthony's remains, testifies in the murder trial of Casey Anthony at the Orange County Courthouse in Orlando, Florida, Tuesday, June 28.

  • Casey Anthony Trial June 27, 2011

    Defense attorney Jose Baez, left and Assistant state attorney Jeff Ashton, center, look over evidence with witness Dr. Kenneth Furton, a forensic chemist, during the Casey Anthony trial at the Orange County Courthouse in Orlando, Fla. on Monday, June 27, 2011. Anthony, 25, is charged with the murder of her 2-year old daughter in 2008.

  • Casey Anthony Trial June 27, 2011

    Casey Anthony, left, listens to her attorney Anne Finnell before the start of court in her murder trial at the Orange County Courthouse in Orlando, Fla. on Monday, June 27, 2011. Anthony, 25, is charged with the murder of her 2-year old daughter in 2008.

  • Casey Anthony Trial June 27, 2011

    Jason Forgey, a canine handler for the Orange County Sheriff's Department, testifies during the Casey Anthony trial at the Orange County Courthouse in Orlando, Fla., Monday, June 27, 2011. Anthony, 25, is charged with the murder of her 2-year old daughter in 2008.

  • Casey Anthony Trial June 27, 2011

    An image projected on a courtroom monitor shows a portion of a Powerpoint presentation entered into evidence at the Casey Anthony trial at the Orange County Courthouse in Orlando, Florida, Monday, June 27, 2011.

  • Casey Anthony Trial June 23, 2011

    Cindy Anthony testifies during her daughter Casey Anthony's murder trial at the Orange County Courthouse, in Orlando, Fla., Thursday, June 23, 2011. Casey Anthony is charged with killing her daughter, Caylee in 2008.

  • Casey Anthony Trial June 23, 2011

    Casey Anthony sits at the defense table during a recess during her murder trial at the Orange County Courthouse in Orlando, Florida, on Thursday, June 23, 2011.

  • Casey Anthony Trial June 23, 2011

    Evidence is lined up in front of Dr. Barry Logan, an analytic chemist, as he waits to testify on day 26 of Casey Anthony's murder trial at the Orange County Courthouse, in Orlando, Fla., Thursday, June 23, 2011. Anthony is charged with killing her daughter, Caylee.

  • Casey Anthony Trial Photos

    An image projected on a courtroom monitor shows a photograph entered into evidence during the Casey Anthony trial at the Orange County Courthouse in Orlando, Fla., Thursday, June 23, 2011. Casey Anthony, 25, is charged with killing her daughter Caylee in the summer of 2008.

  • Casey Anthony Trial June 23, 2011

    Judge Belvin Perry on day 26 of Casey Anthony's 1st-degree murder trial at the Orange County Courthouse in Orlando, Fla., Thursday, June 23, 2011. Casey Anthony, 25, is charged with killing her daughter Caylee in the summer of 2008.

  • Casey Anthony Trial Photos

    A picture of computer reports from the Anthony desktop computer is shown on a courtroom monitor on day 26 of Casey Anthony's first degree murder trial at the Orange County Courthouse in Orlando, Fla., Thursday, June 23, 2011. Casey Anthony, 25, is charged with killing her daughter Caylee in the summer of 2008. (AP Photo/Red Huber, Pool)

  • Casey Anthony Trial June 22, 2011

    Casey Anthony talks with her attorney Jose Baez, left, during a recess in her murder trial at the Orange County Courthouse in Orlando, Florida, Wednesday, June 22, 2011.

  • Casey Anthony Trial June 22, 2011

    Cindy Anthony listens in court during the trial of her daughter Casey Anthony at the Orange County Courthouse in Orlando, Florida, Wednesday, June 22, 2011.

  • Casey Anthony Trial Photos

    An image projected on a courtroom monitor shows a photo entered into evidence in the trial of Casey Anthony at the Orange County Courthouse in Orlando, Florida.

  • Casey Anthony Trial June 22, 2011

    Dr. Michael Sigman testifies about air samples during the Casey Anthony trial at the Orange County Courthouse in Orlando, Florida, Wednesday, June 22, 2011.

  • Casey Anthony Trial June 22, 2011

    Maureen Bottrell, a forensic geologist for the FBI, testifies in the trial of Casey Anthony at the Orange County Courthouse in Orlando, Florida, Wednesday, June 22, 2011. (Red Huber/Orlando Sentinel/MCT)

  • Casey Anthony Trial June 20, 2011

    Judge Belvin Perry, center, holds a sidebar conference with attorneys in the Casey Anthony murder trail in Orlando, Fla., on Monday, June 20, 2011. An infuriated Perry warned the Anthony defense and prosecution today that he is getting fed up with games being played during the course of the trial. Court was recessed early without explanation.

  • Casey Anthony Trial June 20, 2011

    Assistant state attorney Jeff Ashton listens to Judge Belvin Perry's directions during the Casey Anthony trial at the Orange County Courthouse in Orlando, Florida, Monday, June 20, 2011.

  • Casey Anthony Trial June 20, 2011

    Defense attorney Jose Baez, second from right, and his client Casey Anthony listen to assistant state attorney Jeff Ashton talk to Judge Belvin Perry, not pictured, before the start of court at the Orange County Courthouse in Orlando, Florida, Monday, June 20, 2011. (Red Huber/Orlando Sentinel/MCT)

  • Casey Anthony Trial June 20, 2011

    Casey Anthony enters the courtroom for the 22nd day of her murder trial at the Orange County Courthouse in Orlando, Florida, Monday, June 20, 2011.

  • Casey Anthony Trial

    During forensic expert Dr. Spitz's testimony, Casey Anthony turns her head away when photos of the skull of her daughter, Caylee Marie, were shown at the Orange County Courthouse in Orlando, Fla., Saturday, June 18, 2011. Anthony, 25, is charged with killing her daughter Caylee in the summer of 2008.

  • Casey Anthony Trial June 18, 2011

    Forensic expert Dr. Werner Spitz testifies in the trial of Casey Anthony, talking about autopsy results of the remains of Caylee Anthony at the Orange County Courthouse in Orlando, Fla., Saturday, June 18, 2011. Anthony, 25, is charged with killing her daughter Caylee in the summer of 2008.

  • Casey Anthony Trial June 18, 2011

    Chief Judge Belvin Perry expresses deep frustration at the Orange County Courthouse in Orlando, Fla., Saturday, June 18, 2011, that defense attorney Jose Baez attempted to elicit critical testimony from William Rodriguez, testimony that had not been disclosed to the prosecution earlier. Perry may end up punishing Baez with a contempt finding, but he reserved ruling on that matter. Casey Anthony, 25, is charged with killing her daughter Caylee in the summer of 2008.

  • Casey Anthony Trial June 18, 2011

    Casey Anthony, right, consoles her attorney Jose Baez after Chief Judge Belvin Perry expressed deep frustration that defense attorney Jose Baez attempted to elicit critical testimony from William Rodriguez, testimony that had not been disclosed to the prosecution earlier. Perry may end up punishing Baez with a contempt finding, but he reserved ruling on that matter. at the Orange County Courthouse in Orlando, Fla., Saturday, June 18, 2011.

  • Casey Anthony Trial June 17, 2011

    Casey Anthony is shown at the defense table before the start of court in her murder trial at the Orange County Courthouse, Friday, June 17, 2011 in Orlando, Fla. Anthony, 25, is charged with killing her daughter Caylee in the summer of 2008.

  • Casey Anthony Trial June 17, 2011

    Dr. Tim Huntington, forensic entomologist, testifies during the murder trial of Casey Anthony at the Orange County Courthouse, Friday, June 17, 2011 in Orlando, Fla. Anthony, 25, is charged with killing her daughter Caylee in the summer of 2008.

  • Casey Anthony Trial June 17, 2011

    An evidence photo showing trash found in the trunk of a car is held by an attorney during the Casey Anthony murder trial at the Orange County Courthouse, Friday, June 17, 2011 in Orlando, Fla. Anthony, 25, is charged with killing her daughter Caylee in the summer of 2008.

  • Casey Anthony Trial June 17, 2011

    George Anthony listens to testimony during the murder trial of his daughter Casey Anthony at the Orange County Courthouse, Friday, June 17, 2011 in Orlando, Fla. Anthony, 25, is charged with killing her daughter Caylee in the summer of 2008.

  • Casey Anthony Trial June 16, 2011

    Casey Anthony, with her attorney Cheney Mason, during day 20 of her first-degree murder trial at the Orange County Courthouse, in Orlando, Florida, Thursday, June 16, 2011.