What our reporting confirmed happened never occurred to Baez: that, in this small but crucial area, the investigation was so lacking it failed to discover the search.

But if they had, Baez said, he was ready.

"It turned out to be a huge bombshell that we thought would be the knockout blow in this case," Baez said, anticipating the defense would knock out the state by arguing the search showed George Anthony contemplating suicide, not Casey Anthony researching how to kill.

"It appears suicide had long been on George's mind," Baez wrote in “Presumed Guilty,” noting George Anthony attempted suicide in January 2009.

Asked by WKMG if the foolproof suffocation search and visit to the site discussing ways to kill showed consciousness of guilt, Baez said, "To me, it tells me someone's feeling very guilty of something and is considering suicide. To be considering suicide the day Caylee died was huge for us."

Asked if that meant he believed whoever did that search was responsible for Caylee's death, Baez said, "I think 'responsible' is too strong a word."

His book explores various scenarios, all pointing to George Anthony.

But, in doing so, Baez relies on several assumptions that are refuted by evidence developed and confirmed by Humphrey, Goetz and WKMG.

The defense's flawed timeline

As part of the book's "concrete proof" it was George Anthony and not Casey Anthony doing the foolproof suffocation search that afternoon, Baez notes correctly it was immediately preceded by a login to an AOL Instant Messenger account.

"Right after someone logged in to instant messenger," Baez writes in his book, "the first search was to Google" for foolproof suffocation.

That much is confirmed by the evidence. But then Baez errs in writing, "George had an AOL Instant Messenger account. Casey didn't."

In fact, Baez now concedes, Casey Anthony did have such an account, known as AIM.

And Goetz recovered encrypted data showing it was Casey's Anthony’s AIM account screen name – casey o marie – and not George Anthony’s that logged in just before the foolproof suffocation search.

The same AIM account was used to chat on the computer at 7:56 a.m., and was logged in at the outset of other Casey-related Mozilla Firefox browsing session on that day and several others.

That June 16 AIM chat was clearly between Casey Anthony (casey o marie) and a friend known on AIM as WitePlayboi.

"So what r u up 2," WitePlayboi asked at 8:01 that fateful morning.

"Not a whole lot. Checking up on all the MySpace/Facebook hoopla," casey o marie replies 30 seconds later.

Baez said he has corrected the error in subsequent editions of the book.

But, he insists, there is still plenty of evidence that it was George Anthony doing the search that afternoon.