To support that theory, though, he has to discredit the times logged in the browser’s software.

Baez claims the “foolproof suffocation” search occurred at 1:51 p.m., not 2:51 p.m., and that the times on the browser history extracted from the sheriff’s copy of the hard drive failed to take into account the beginning of daylight saving time in March 2008.

A 2:51 p.m. search time makes it difficult for Baez to argue George Anthony was responsible because George Anthony claimed he left the house around 2:30 for a work shift that began at 3 p.m.

In addition, a detailed comparison of the browser times to independent evidence -- some direct, some circumstantial -- corroborates the contention that the search occurred at 2:51 p.m. and not 1:51 p.m., as Baez claims.

Consider:

  • When Osborn first seized the computer and started it on July, 18, 2008 at 12:13 p.m., she testified, the computer's time was "right on the money."
  • On June 16, at 11:27 a.m., the browser logged a photo accessed through Facebook, then a visit to the Photobucket photo sharing site. Eighteen seconds after the photo was accessed in Facebook it was uploaded to Casey’s Photobucket account, according to Photobucket records subpoenaed by the Sheriff's Office in 2008.

If the browser time were incorrect as Baez claims, Photobucket’s records would have placed that activity at 10:27 a.m. (Melich's spreadsheet prepared for the prosecution inaccurately states the photo – showing the inside of a lounge where Casey’s boyfriend held weekly nightclub events -- was uploaded at 9:27 a.m., failing to note Photobucket's record was based on Mountain Time.)

  • Cellphone call and text records also align with the times of computer activity logged by the browser, but only if one accepts the later 2:51 p.m. time for the foolproof suffocation search.

Most strikingly, the browsing session that included that search logs its last activity, involving MySpace, at 2:52 and 55 seconds. Cellphone records show Casey Anthony answered a call from former boyfriend Jesse Grund that was logged at 2:52:53.

They spoke for nearly 12 minutes, the call ending at the 3:04:06 -- the exact second the cell records show a call from George Anthony to Casey Anthony's cell, indicating she disconnected with Grund to take a 26-second call from her father.

In his book, Baez said the call at 3:04 p.m. is "exactly when (George) would have arrived at work." Records also show George used his cell to call his house landline at 3:02 p.m., indicating he was not home at the time.

It was during that 3:04 p.m. call, Baez writes, that Casey Anthony claims her father told her, "I took care of everything," meaning he disposed of the body and warned her not to tell her mother, Cindy Anthony, about Caylee's death.

Thirty minutes later, Casey Anthony called her then-boyfriend, Tony Lazzaro.

Baez suspected the state did not want to introduce at trial cell and computer records because they refuted something George Anthony had insisted on all along: that he is certain Casey Anthony and Caylee left the house at 12:50 that afternoon.

As WKMG first revealed in 2009, Casey's cellphone indicated it was at or near the house that entire day, until she headed toward Lazzaro's apartment at 4:11 p.m.

And the newly uncovered browser histories further indicate Casey Anthony was at the house past 12:50 that afternoon. Her password-protected computer account activates the browser at 1:39 p.m., revealing activity associated with her AIM account and MySpace and Facebook. The last browser activity during that session is at 1:42 p.m.; two minutes later, Casey Anthony calls her friend, Amy Huizenga, and they talk until 2:21 p.m.

Twenty-eight minutes later, browser histories show, Casey Anthony's account on the computer is back online just before the search for foolproof suffocation.

Later, in testimony, neither Huizenga nor Grund recalled anything unusual about Casey's tone during those phone calls.

Questions remain

None of this, of course, is proof that Casey Anthony killed Caylee. A jury has found her not guilty and the Constitution generally precludes her from being tried again for the same crime.