The Florida sheriff's office that investigated the case of Casey Anthony's missing daughter overlooked evidence that someone in her home did a Google search for fool-proof suffocation methods the day Anthony's daughter was last seen alive, new reports show.

USA Today reports:

Orange County sheriff's Capt. Angelo Nieves said Sunday that the office's computer investigator missed the June 16, 2008, search. The agency's admission was first reported by Orlando television station WKMG. It's not known who performed the search. The station reported it was done on a browser primarily used by the 2-year-old's mother, Casey Anthony, who was acquitted of the girl's murder in 2011.

Anthony's attorneys argued during trial that Casey Anthony helped her father, George Anthony, cover up the girl's drowning in the family pool.

WKMG reports that sheriff's investigators pulled 17 vague entries only from the computer's Internet Explorer browser, not the Mozilla Firefox browser commonly used by Casey Anthony. More than 1,200 Firefox entries, including the suffocation search, were overlooked.

Whoever did the search clicked on an article about suicide. The article discussed taking poison and putting a bag over your head.

The next recorded activity was on MySpace, which Anthony, not her father, used, according to Fox News.

At Anthony's trial, prosecutors argued that Caylee, Anthony's 2-year-old daughter, was poisoned with chloroform and suffocated with duct tape. The exact cause of death is unknown since the girl's body was too decomposed for an exact cause to be determined.

 

Reach Senior News Editor Hannah Madans here.